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node-imap-2
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Manipulate buffers instead of utf8 strings when retrieving headers or message bodies.

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Brian White 14 years ago
parent 6e99f17fc1
commit ec4111df22
1 changed files with 117 additions and 35 deletions
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152
imap.js
Unescape Escape View File

@ -1,13 +1,14 @@
var util = require('util'), net = require('net'),
tls = require('tls'), EventEmitter = require('events').EventEmitter;
var emptyFn = function() {}, CRLF = "\r\n", debug=emptyFn,
var emptyFn = function() {}, CRLF = '\r\n', debug=emptyFn,
STATES = {
NOCONNECT: 0,
NOAUTH: 1,
AUTH: 2,
BOXSELECTING: 3,
BOXSELECTED: 4
}, BOX_ATTRIBS = ['NOINFERIORS', 'NOSELECT', 'MARKED', 'UNMARKED'];
}, BOX_ATTRIBS = ['NOINFERIORS', 'NOSELECT', 'MARKED', 'UNMARKED'],
reFetch = /^\* \d+ FETCH .+? \{(\d+)\}\r\n/;
function ImapConnection (options) {
if (!(this instanceof ImapConnection))
@ -34,7 +35,7 @@ function ImapConnection (options) {
tmrKeepalive: null,
tmoKeepalive: 10000,
tmrConn: null,
curData: '',
curData: null,
curExpected: 0,
curXferred: 0,
capabilities: [],
@ -108,9 +109,9 @@ ImapConnection.prototype.connect = function(loginCb) {
this._state.conn.on('secure', function() {
debug('Secure connection made.');
});
this._state.conn.cleartext.setEncoding('utf8');
//this._state.conn.cleartext.setEncoding('utf8');
} else {
this._state.conn.setEncoding('utf8');
//this._state.conn.setEncoding('utf8');
this._state.conn.cleartext = this._state.conn;
}
@ -126,16 +127,19 @@ ImapConnection.prototype.connect = function(loginCb) {
this._state.conn.cleartext.on('data', function(data) {
if (data.length === 0) return;
var trailingCRLF = false, literalInfo;
debug('\n<<RECEIVED>>: ' + util.inspect(data) + '\n');
debug('\n<<RECEIVED>>: ' + util.inspect(data.toString()) + '\n');
if (self._state.curExpected === 0) {
if (data.indexOf(CRLF) === -1) {
self._state.curData += data;
if (self._state.curData)
self._state.curData = self._state.curData.add(data);
else
self._state.curData = data;
return;
}
if (self._state.curData.length) {
data = self._state.curData + data;
self._state.curData = '';
if (self._state.curData && self._state.curData.length) {
data = self._state.curData.add(data);
self._state.curData = null;
}
}
@ -145,22 +149,22 @@ ImapConnection.prototype.connect = function(loginCb) {
if (!curReq._done) {
var chunk = data;
self._state.curXferred += Buffer.byteLength(data, 'utf8');
self._state.curXferred += data.length;
if (self._state.curXferred > self._state.curExpected) {
var pos = Buffer.byteLength(data, 'utf8')
var pos = data.length
- (self._state.curXferred - self._state.curExpected),
extra = (new Buffer(data)).slice(pos).toString('utf8');
extra = data.slice(pos);
if (pos > 0)
chunk = (new Buffer(data)).slice(0, pos).toString('utf8');
chunk = data.slice(0, pos);
else
chunk = undefined;
data = extra;
curReq._done = 1;
}
if (chunk) {
if (chunk && chunk.length) {
if (curReq._msgtype === 'headers')
self._state.curData += chunk;
self._state.curData.append(chunk, self._state.curXferred);
else
curReq._msg.emit('data', chunk);
}
@ -169,13 +173,17 @@ ImapConnection.prototype.connect = function(loginCb) {
var restDesc;
if (curReq._done === 1) {
if (curReq._msgtype === 'headers')
curReq._headers = self._state.curData;
self._state.curData = '';
curReq._headers = self._state.curData.toString();
self._state.curData = null;
curReq._done = true;
}
self._state.curData += data;
if (restDesc = self._state.curData.match(/^(.*?)\)\r\n/)) {
if (self._state.curData)
self._state.curData = self._state.curData.add(data);
else
self._state.curData = data;
if (restDesc = self._state.curData.toString().match(/^(.*?)\)\r\n/)) {
if (restDesc[1]) {
restDesc[1] = restDesc[1].trim();
if (restDesc[1].length)
@ -183,14 +191,14 @@ ImapConnection.prototype.connect = function(loginCb) {
} else
restDesc[1] = '';
parseFetch(curReq._desc + restDesc[1], curReq._headers, curReq._msg);
data = self._state.curData.substring(self._state.curData.indexOf(CRLF)
+ 2);
data = self._state.curData.slice(self._state.curData.indexOf(CRLF)
+ 2);
curReq._done = false;
self._state.curXferred = 0;
self._state.curExpected = 0;
self._state.curData = '';
self._state.curData = null;
curReq._msg.emit('end');
if (data.length && data[0] === '*') {
if (data.length && data[0] === 42/* '*' */) {
self._state.conn.cleartext.emit('data', data);
return;
}
@ -199,36 +207,49 @@ ImapConnection.prototype.connect = function(loginCb) {
} else
return;
} else if (self._state.curExpected === 0
&& (literalInfo = data.match(/^\* \d+ FETCH .+? \{(\d+)\}\r\n/))) {
&& (literalInfo = data.toString().match(reFetch))) {
self._state.curExpected = parseInt(literalInfo[1], 10);
var idxCRLF = data.indexOf(CRLF),
curReq = self._state.requests[0],
type = /BODY\[(.*)\](?:\<\d+\>)?/.exec(data.substring(0, idxCRLF)),
type = /BODY\[(.*)\](?:\<\d+\>)?/
.exec(data.toString().substring(0, idxCRLF)),
msg = new ImapMessage(),
desc = data.substring(data.indexOf("(")+1, idxCRLF).trim();
desc = data.toString().substring(data.indexOf('(')+1, idxCRLF).trim();
type = type[1];
curReq._desc = desc;
curReq._msg = msg;
curReq._fetcher.emit('message', msg);
curReq._msgtype = (type.indexOf('HEADER') === 0 ? 'headers' : 'body');
self._state.conn.cleartext.emit('data', data.substring(idxCRLF + 2));
if (curReq._msgtype === 'headers')
self._state.curData = new Buffer(self._state.curExpected);
self._state.conn.cleartext.emit('data', data.slice(idxCRLF + 2));
return;
}
if (data.length === 0)
return;
data = data.split(CRLF).filter(isNotEmpty);
var endsInCRLF = (data[data.length-2] === 13 && data[data.length-1] === 10);
data = data.split(CRLF);
// Defer any extra server responses found in the incoming data
if (data.length > 1) {
data.slice(1).forEach(function(line) {
process.nextTick(function() {
self._state.conn.cleartext.emit('data', line + CRLF);
});
});
for (var i=1,len=data.length; i<len; ++i) {
(function(line, isLast) {
process.nextTick(function() {
var needsCRLF = !isLast || (isLast && endsInCRLF),
b = new Buffer(needsCRLF ? line.length + 2 : line.length);
line.copy(b, 0, 0);
if (needsCRLF) {
b[b.length-2] = 13;
b[b.length-1] = 10;
}
self._state.conn.cleartext.emit('data', b);
});
})(data[i], i === len-1);
}
}
data = data[0].explode(' ', 3);
data = data[0].toString().explode(' ', 3);
if (data[0] === '*') { // Untagged server response
if (self._state.status === STATES.NOAUTH) {
@ -1438,6 +1459,67 @@ function extend() {
return target;
};
Buffer.prototype.append = function(buf, start) {
buf.copy(this, start, 0);
};
Buffer.prototype.add = function(buf) {
var newBuf = new Buffer(this.length + buf.length);
this.copy(newBuf, 0, 0);
buf.copy(newBuf, this.length, 0);
return newBuf;
};
Buffer.prototype.split = function(str) {
if ((typeof str !== 'string' && !Array.isArray(str))
|| str.length === 0 || str.length > this.length)
return [this];
var search = !Array.isArray(str)
? str.split('').map(function(el) { return el.charCodeAt(0); })
: str,
searchLen = search.length,
ret = [], pos, start = 0;
while ((pos = this.indexOf(search, start)) > -1) {
ret.push(this.slice(start, pos));
start = pos + searchLen;
}
if (!ret.length)
ret = [this];
else if (start < this.length)
ret.push(this.slice(start));
return ret;
};
Buffer.prototype.indexOf = function(str, start) {
if (str.length > this.length)
return -1;
var search = !Array.isArray(str)
? str.split('').map(function(el) { return el.charCodeAt(0); })
: str,
searchLen = search.length,
ret = -1, i, j, len;
for (i=start||0,len=this.length; i<len; ++i) {
if (this[i] == search[0] && (len-i) >= searchLen) {
if (searchLen > 1) {
for (j=1; j<searchLen; ++j) {
if (this[i+j] != search[j])
break;
else if (j == searchLen-1) {
ret = i;
break;
}
}
} else
ret = i;
if (ret > -1)
break;
}
}
return ret;
};
net.Stream.prototype.setSecure = function() {
var pair = tls.createSecurePair();
var cleartext = pipe(pair, this);

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