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656 lines
24 KiB
JavaScript
656 lines
24 KiB
JavaScript
var Promise, S, addErrorData, bhttpAPI, concatStream, createCookieJar, debug, doPayloadRequest, doRedirect, errors, formData, formFixArray, http, https, isStream, makeRequest, ofTypes, packageConfig, prepareCleanup, prepareDefaults, prepareOptions, preparePayload, prepareProtocol, prepareRequest, prepareSession, prepareUrl, processResponse, querystring, redirectGet, redirectUnchanged, stream, streamLength, toughCookie, urlUtil, util, _;
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urlUtil = require("url");
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querystring = require("querystring");
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stream = require("stream");
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http = require("http");
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https = require("https");
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util = require("util");
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Promise = require("bluebird");
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_ = require("lodash");
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S = require("string");
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formFixArray = require("form-fix-array");
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errors = require("errors");
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debug = require("debug")("bhttp");
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formData = require("form-data2");
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concatStream = require("concat-stream");
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toughCookie = require("tough-cookie");
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streamLength = require("stream-length");
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packageConfig = require("../package.json");
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errors.create({
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name: "bhttpError"
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});
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errors.create({
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name: "ConflictingOptionsError",
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parents: errors.bhttpError
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});
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errors.create({
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name: "UnsupportedProtocolError",
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parents: errors.bhttpError
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});
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errors.create({
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name: "RedirectError",
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parents: errors.bhttpError
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});
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errors.create({
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name: "MultipartError",
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parents: errors.bhttpError
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});
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ofTypes = function(obj, types) {
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var match, type, _i, _len;
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match = false;
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for (_i = 0, _len = types.length; _i < _len; _i++) {
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type = types[_i];
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match = match || obj instanceof type;
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}
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return match;
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};
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addErrorData = function(err, request, response, requestState) {
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err.request = request;
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err.response = response;
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err.requestState = requestState;
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return err;
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};
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isStream = function(obj) {
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return (obj != null) && (ofTypes(obj, [stream.Readable, stream.Duplex, stream.Transform]) || obj.hasOwnProperty("_bhttpStreamWrapper"));
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};
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prepareSession = function(request, response, requestState) {
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debug("preparing session");
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return Promise["try"](function() {
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if (requestState.sessionOptions != null) {
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request.options = _.merge(_.clone(requestState.sessionOptions), request.options);
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}
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if (request.options.headers != null) {
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request.options.headers = _.clone(request.options.headers, true);
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} else {
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request.options.headers = {};
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}
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if (request.options.cookieJar != null) {
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return Promise["try"](function() {
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request.cookieJar = request.options.cookieJar;
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delete request.options.cookieJar;
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return request.cookieJar.get(request.url);
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}).then(function(cookieString) {
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debug("sending cookie string: %s", cookieString);
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request.options.headers["cookie"] = cookieString;
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return Promise.resolve([request, response, requestState]);
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});
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} else {
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return Promise.resolve([request, response, requestState]);
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}
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});
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};
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prepareDefaults = function(request, response, requestState) {
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debug("preparing defaults");
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return Promise["try"](function() {
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var _base, _base1, _base2, _ref, _ref1, _ref2, _ref3, _ref4, _ref5, _ref6, _ref7;
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request.responseOptions = {
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discardResponse: (_ref = request.options.discardResponse) != null ? _ref : false,
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keepRedirectResponses: (_ref1 = request.options.keepRedirectResponses) != null ? _ref1 : false,
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followRedirects: (_ref2 = request.options.followRedirects) != null ? _ref2 : true,
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noDecode: (_ref3 = request.options.noDecode) != null ? _ref3 : false,
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decodeJSON: (_ref4 = request.options.decodeJSON) != null ? _ref4 : false,
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stream: (_ref5 = request.options.stream) != null ? _ref5 : false,
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justPrepare: (_ref6 = request.options.justPrepare) != null ? _ref6 : false,
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redirectLimit: (_ref7 = request.options.redirectLimit) != null ? _ref7 : 10
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};
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if ((_base = request.options).allowChunkedMultipart == null) {
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_base.allowChunkedMultipart = false;
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}
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if ((_base1 = request.options).forceMultipart == null) {
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_base1.forceMultipart = false;
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}
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if ((_base2 = request.options.headers)["user-agent"] == null) {
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_base2["user-agent"] = "bhttp/" + packageConfig.version;
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}
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request.options.method = request.options.method.toLowerCase();
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return Promise.resolve([request, response, requestState]);
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});
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};
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prepareUrl = function(request, response, requestState) {
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debug("preparing URL");
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return Promise["try"](function() {
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var urlOptions, _ref;
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urlOptions = urlUtil.parse(request.url, true);
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_.extend(request.options, {
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hostname: urlOptions.hostname,
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port: urlOptions.port
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});
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request.options.path = urlUtil.format({
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pathname: urlOptions.pathname,
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query: (_ref = request.options.query) != null ? _ref : urlOptions.query
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});
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request.protocol = S(urlOptions.protocol).chompRight(":").toString();
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return Promise.resolve([request, response, requestState]);
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});
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};
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prepareProtocol = function(request, response, requestState) {
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debug("preparing protocol");
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return Promise["try"](function() {
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var _base;
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request.protocolModule = (function() {
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switch (request.protocol) {
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case "http":
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return http;
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case "https":
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return https;
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default:
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return null;
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}
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})();
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if (request.protocolModule == null) {
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return Promise.reject()(new errors.UnsupportedProtocolError("The protocol specified (" + protocol + ") is not currently supported by this module."));
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}
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if ((_base = request.options).port == null) {
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_base.port = (function() {
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switch (request.protocol) {
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case "http":
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return 80;
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case "https":
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return 443;
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}
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})();
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}
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return Promise.resolve([request, response, requestState]);
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});
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};
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prepareOptions = function(request, response, requestState) {
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debug("preparing options");
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return Promise["try"](function() {
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var _base;
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if (((request.options.formFields != null) || (request.options.files != null)) && ((request.options.inputStream != null) || (request.options.inputBuffer != null))) {
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return Promise.reject(addErrorData(new errors.ConflictingOptionsError("You cannot define both formFields/files and a raw inputStream or inputBuffer."), request, response, requestState));
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}
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if (request.options.encodeJSON && ((request.options.inputStream != null) || (request.options.inputBuffer != null))) {
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return Promise.reject(addErrorData(new errors.ConflictingOptionsError("You cannot use both encodeJSON and a raw inputStream or inputBuffer.", void 0, "If you meant to JSON-encode the stream, you will currently have to do so manually."), request, response, requestState));
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}
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if (request.responseOptions.stream) {
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if ((_base = request.options).agent == null) {
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_base.agent = false;
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}
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}
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return Promise.resolve([request, response, requestState]);
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});
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};
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preparePayload = function(request, response, requestState) {
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debug("preparing payload");
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return Promise["try"](function() {
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var containsStreams, fieldName, fieldValue, formDataObject, multipart, streamOptions, valueElement, _i, _len, _ref, _ref1, _ref2;
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multipart = request.options.forceMultipart || (request.options.files != null);
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multipart = multipart || _.any(request.options.formFields, function(item) {
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return item instanceof Buffer || isStream(item);
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});
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_.extend(request.options.formFields, request.options.files);
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containsStreams = _.any(request.options.formFields, function(item) {
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return isStream(item);
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});
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if (request.options.encodeJSON && containsStreams) {
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return Promise.reject()(new errors.ConflictingOptionsError("Sending a JSON-encoded payload containing data from a stream is not currently supported.", void 0, "Either don't use encodeJSON, or read your stream into a string or Buffer."));
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}
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if ((_ref = request.options.method) === "post" || _ref === "put" || _ref === "patch") {
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if ((request.options.encodeJSON || (request.options.formFields != null)) && !multipart) {
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debug("got url-encodable form-data");
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request.options.headers["content-type"] = "application/x-www-form-urlencoded";
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if (request.options.encodeJSON) {
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request.payload = JSON.stringify((_ref1 = request.options.formFields) != null ? _ref1 : null);
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} else if (!_.isEmpty(request.options.formFields)) {
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request.payload = querystring.stringify(formFixArray(request.options.formFields));
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} else {
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request.payload = "";
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}
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request.options.headers["content-length"] = request.payload.length;
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return Promise.resolve();
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} else if ((request.options.formFields != null) && multipart) {
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debug("got multipart form-data");
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formDataObject = new formData();
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_ref2 = formFixArray(request.options.formFields);
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for (fieldName in _ref2) {
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fieldValue = _ref2[fieldName];
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if (!_.isArray(fieldValue)) {
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fieldValue = [fieldValue];
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}
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for (_i = 0, _len = fieldValue.length; _i < _len; _i++) {
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valueElement = fieldValue[_i];
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if (valueElement._bhttpStreamWrapper != null) {
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streamOptions = valueElement.options;
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valueElement = valueElement.stream;
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} else {
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streamOptions = {};
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}
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formDataObject.append(fieldName, valueElement, streamOptions);
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}
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}
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request.payloadStream = formDataObject;
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return Promise["try"](function() {
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return formDataObject.getHeaders();
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}).then(function(headers) {
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if (headers["content-transfer-encoding"] === "chunked" && !request.options.allowChunkedMultipart) {
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return Promise.reject(addErrorData(new MultipartError("Most servers do not support chunked transfer encoding for multipart/form-data payloads, and we could not determine the length of all the input streams. See the documentation for more information."), request, response, requestState));
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} else {
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_.extend(request.options.headers, headers);
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return Promise.resolve();
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}
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});
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} else if (request.options.inputStream != null) {
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debug("got inputStream");
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return Promise["try"](function() {
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var _ref3;
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request.payloadStream = request.options.inputStream;
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if ((request.payloadStream._bhttpStreamWrapper != null) && ((request.payloadStream.options.contentLength != null) || (request.payloadStream.options.knownLength != null))) {
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return Promise.resolve((_ref3 = request.payloadStream.options.contentLength) != null ? _ref3 : request.payloadStream.options.knownLength);
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} else {
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return streamLength(request.options.inputStream);
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}
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}).then(function(length) {
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debug("length for inputStream is %s", length);
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return request.options.headers["content-length"] = length;
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})["catch"](function(err) {
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debug("unable to determine inputStream length, switching to chunked transfer encoding");
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return request.options.headers["content-transfer-encoding"] = "chunked";
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});
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} else if (request.options.inputBuffer != null) {
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debug("got inputBuffer");
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if (typeof request.options.inputBuffer === "string") {
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request.payload = new Buffer(request.options.inputBuffer);
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} else {
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request.payload = request.options.inputBuffer;
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}
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debug("length for inputBuffer is %s", request.payload.length);
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request.options.headers["content-length"] = request.payload.length;
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return Promise.resolve();
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}
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} else {
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return Promise.resolve();
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}
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}).then(function() {
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return Promise.resolve([request, response, requestState]);
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});
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};
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prepareCleanup = function(request, response, requestState) {
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debug("preparing cleanup");
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return Promise["try"](function() {
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var fixedHeaders, key, value, _i, _len, _ref, _ref1;
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_ref = ["query", "formFields", "files", "encodeJSON", "inputStream", "inputBuffer", "discardResponse", "keepRedirectResponses", "followRedirects", "noDecode", "decodeJSON", "allowChunkedMultipart", "forceMultipart"];
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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key = _ref[_i];
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delete request.options[key];
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}
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fixedHeaders = {};
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_ref1 = request.options.headers;
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for (key in _ref1) {
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value = _ref1[key];
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fixedHeaders[key.toLowerCase()] = value;
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}
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request.options.headers = fixedHeaders;
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return Promise.resolve([request, response, requestState]);
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});
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};
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prepareRequest = function(request, response, requestState) {
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debug("preparing request");
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return Promise["try"](function() {
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var middlewareFunctions, promiseChain;
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middlewareFunctions = [prepareSession, prepareDefaults, prepareUrl, prepareProtocol, prepareOptions, preparePayload, prepareCleanup];
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promiseChain = Promise.resolve([request, response, requestState]);
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middlewareFunctions.forEach(function(middleware) {
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return promiseChain = promiseChain.spread(function(_request, _response, _requestState) {
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return middleware(_request, _response, _requestState);
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});
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});
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return promiseChain;
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});
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};
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makeRequest = function(request, response, requestState) {
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debug("making %s request to %s", request.options.method.toUpperCase(), request.url);
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return Promise["try"](function() {
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var req;
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req = request.protocolModule.request(request.options);
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if (request.payload != null) {
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debug("sending payload");
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req.write(request.payload);
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req.end();
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} else if (request.payloadStream != null) {
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debug("piping payloadStream");
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if (request.payloadStream._bhttpStreamWrapper != null) {
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request.payloadStream.stream.pipe(req);
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} else {
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request.payloadStream.pipe(req);
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}
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} else {
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debug("closing request without payload");
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req.end();
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}
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return new Promise(function(resolve, reject) {
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req.on("error", function(err) {
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return reject(err);
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});
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return req.on("response", function(res) {
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return resolve(res);
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});
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});
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}).then(function(response) {
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return Promise.resolve([request, response, requestState]);
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});
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};
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processResponse = function(request, response, requestState) {
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debug("processing response, got status code %s", response.statusCode);
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return Promise["try"](function() {
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var cookieHeader, promises;
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if ((request.cookieJar != null) && (response.headers["set-cookie"] != null)) {
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promises = (function() {
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var _i, _len, _ref, _results;
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_ref = response.headers["set-cookie"];
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_results = [];
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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cookieHeader = _ref[_i];
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debug("storing cookie: %s", cookieHeader);
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_results.push(request.cookieJar.set(cookieHeader, request.url));
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}
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return _results;
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})();
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return Promise.all(promises);
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} else {
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return Promise.resolve();
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}
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}).then(function() {
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var _ref, _ref1;
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response.request = request;
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response.requestState = requestState;
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response.redirectHistory = requestState.redirectHistory;
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if (((_ref = response.statusCode) === 301 || _ref === 302 || _ref === 303 || _ref === 307) && request.responseOptions.followRedirects) {
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if (requestState.redirectHistory.length >= (request.responseOptions.redirectLimit - 1)) {
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return Promise.reject(addErrorData(new errors.RedirectError("The maximum amount of redirects ({request.responseOptions.redirectLimit}) was reached.")));
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}
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switch (response.statusCode) {
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case 301:
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switch (request.options.method) {
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case "get":
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case "head":
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return redirectUnchanged(request, response, requestState);
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case "post":
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case "put":
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case "patch":
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case "delete":
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return Promise.reject(addErrorData(new errors.RedirectError("Encountered a 301 redirect for POST, PUT, PATCH or DELETE. RFC says we can't automatically continue."), request, response, requestState));
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default:
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return Promise.reject(addErrorData(new errors.RedirectError("Encountered a 301 redirect, but not sure how to proceed for the " + (request.options.method.toUpperCase()) + " method.")));
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}
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break;
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case 302:
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case 303:
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return redirectGet(request, response, requestState);
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case 307:
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if (request.containsStreams && ((_ref1 = request.options.method) !== "get" && _ref1 !== "head")) {
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return Promise.reject(addErrorData(new errors.RedirectError("Encountered a 307 redirect for POST, PUT or DELETE, but your payload contained (single-use) streams. We therefore can't automatically follow the redirect."), request, response, requestState));
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} else {
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return redirectUnchanged(request, response, requestState);
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}
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}
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} else if (request.responseOptions.discardResponse) {
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response.resume();
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return Promise.resolve(response);
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} else {
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return new Promise(function(resolve, reject) {
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if (request.responseOptions.stream) {
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return resolve(response);
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} else {
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response.on("error", function(err) {
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return reject(err);
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});
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return response.pipe(concatStream(function(body) {
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var err, _ref2;
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if (request.responseOptions.decodeJSON || (((_ref2 = response.headers["content-type"]) != null ? _ref2 : "").split(";")[0] === "application/json" && !request.responseOptions.noDecode)) {
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try {
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response.body = JSON.parse(body);
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} catch (_error) {
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err = _error;
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reject(err);
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}
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} else {
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response.body = body;
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}
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return resolve(response);
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}));
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}
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});
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}
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}).then(function(response) {
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return Promise.resolve([request, response, requestState]);
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});
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};
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doPayloadRequest = function(url, data, options, callback) {
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if (isStream(data)) {
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options.inputStream = data;
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} else if (ofTypes(data, [Buffer]) || typeof data === "string") {
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options.inputBuffer = data;
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} else {
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options.formFields = data;
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}
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return this.request(url, options, callback);
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};
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redirectGet = function(request, response, requestState) {
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debug("following forced-GET redirect to %s", response.headers["location"]);
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return Promise["try"](function() {
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var key, options, _i, _len, _ref;
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options = _.clone(requestState.originalOptions);
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options.method = "get";
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_ref = ["inputBuffer", "inputStream", "files", "formFields"];
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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key = _ref[_i];
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delete options[key];
|
|
}
|
|
return doRedirect(request, response, requestState, options);
|
|
});
|
|
};
|
|
|
|
redirectUnchanged = function(request, response, requestState) {
|
|
debug("following same-method redirect to %s", response.headers["location"]);
|
|
return Promise["try"](function() {
|
|
var options;
|
|
options = _.clone(requestState.originalOptions);
|
|
return doRedirect(request, response, requestState, options);
|
|
});
|
|
};
|
|
|
|
doRedirect = function(request, response, requestState, newOptions) {
|
|
return Promise["try"](function() {
|
|
if (!request.responseOptions.keepRedirectResponses) {
|
|
response.resume();
|
|
}
|
|
requestState.redirectHistory.push(response);
|
|
return bhttpAPI._doRequest(response.headers["location"], newOptions, requestState);
|
|
});
|
|
};
|
|
|
|
createCookieJar = function(jar) {
|
|
return {
|
|
set: function(cookie, url) {
|
|
return new Promise((function(_this) {
|
|
return function(resolve, reject) {
|
|
return _this.jar.setCookie(cookie, url, function(err, cookie) {
|
|
if (err) {
|
|
return reject(err);
|
|
} else {
|
|
return resolve(cookie);
|
|
}
|
|
});
|
|
};
|
|
})(this));
|
|
},
|
|
get: function(url) {
|
|
return new Promise((function(_this) {
|
|
return function(resolve, reject) {
|
|
return _this.jar.getCookieString(url, function(err, cookies) {
|
|
if (err) {
|
|
return reject(err);
|
|
} else {
|
|
return resolve(cookies);
|
|
}
|
|
});
|
|
};
|
|
})(this));
|
|
},
|
|
jar: jar
|
|
};
|
|
};
|
|
|
|
bhttpAPI = {
|
|
head: function(url, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options.method = "head";
|
|
return this.request(url, options, callback);
|
|
},
|
|
get: function(url, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options.method = "get";
|
|
return this.request(url, options, callback);
|
|
},
|
|
post: function(url, data, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options.method = "post";
|
|
return doPayloadRequest.bind(this)(url, data, options, callback);
|
|
},
|
|
put: function(url, data, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options.method = "put";
|
|
return doPayloadRequest.bind(this)(url, data, options, callback);
|
|
},
|
|
patch: function(url, data, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options.method = "patch";
|
|
return doPayloadRequest.bind(this)(url, data, options, callback);
|
|
},
|
|
"delete": function(url, data, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options.method = "delete";
|
|
return this.request(url, options, callback);
|
|
},
|
|
request: function(url, options, callback) {
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
return this._doRequest(url, options).nodeify(callback);
|
|
},
|
|
_doRequest: function(url, options, requestState) {
|
|
return Promise["try"]((function(_this) {
|
|
return function() {
|
|
var request, response, _ref;
|
|
request = {
|
|
url: url,
|
|
options: _.clone(options)
|
|
};
|
|
response = null;
|
|
if (requestState == null) {
|
|
requestState = {
|
|
originalOptions: _.clone(options),
|
|
redirectHistory: []
|
|
};
|
|
}
|
|
if (requestState.sessionOptions == null) {
|
|
requestState.sessionOptions = (_ref = _this._sessionOptions) != null ? _ref : {};
|
|
}
|
|
return prepareRequest(request, response, requestState);
|
|
};
|
|
})(this)).spread((function(_this) {
|
|
return function(request, response, requestState) {
|
|
if (request.responseOptions.justPrepare) {
|
|
return Promise.resolve([request, response, requestState]);
|
|
} else {
|
|
return Promise["try"](function() {
|
|
return bhttpAPI.executeRequest(request, response, requestState);
|
|
}).spread(function(request, response, requestState) {
|
|
return Promise.resolve(response);
|
|
});
|
|
}
|
|
};
|
|
})(this));
|
|
},
|
|
executeRequest: function(request, response, requestState) {
|
|
return Promise["try"](function() {
|
|
return makeRequest(request, response, requestState);
|
|
}).spread(function(request, response, requestState) {
|
|
return processResponse(request, response, requestState);
|
|
});
|
|
},
|
|
session: function(options) {
|
|
var key, session, value;
|
|
if (options == null) {
|
|
options = {};
|
|
}
|
|
options = _.clone(options);
|
|
session = {};
|
|
for (key in this) {
|
|
value = this[key];
|
|
if (value instanceof Function) {
|
|
value = value.bind(session);
|
|
}
|
|
session[key] = value;
|
|
}
|
|
if (options.cookieJar == null) {
|
|
options.cookieJar = createCookieJar(new toughCookie.CookieJar());
|
|
} else if (options.cookieJar === false) {
|
|
delete options.cookieJar;
|
|
} else {
|
|
options.cookieJar = createCookieJar(options.cookieJar);
|
|
}
|
|
session._sessionOptions = options;
|
|
return session;
|
|
},
|
|
wrapStream: function(stream, options) {
|
|
return {
|
|
_bhttpStreamWrapper: true,
|
|
stream: stream,
|
|
options: options
|
|
};
|
|
}
|
|
};
|
|
|
|
module.exports = bhttpAPI;
|