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node-imap-2
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Simplify and fix parsing of message structures and mailbox namespaces

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Brian White 14 years ago
parent 375fae406b
commit ab6403735c
2 changed files with 225 additions and 338 deletions
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26
README.md
Unescape Escape View File

@ -104,13 +104,11 @@ A message structure with multiple parts might look something like the following:
, params: { boundary: '000e0cd294e80dc83c0475bf339b' }
, disposition: null
, language: null
, location: null
}
, [ { partID: '1.1'
, type:
{ name: 'text/plain'
, type: 'text'
, subtype: 'plain'
, params: { charset: 'ISO-8859-1' }
}
, id: null
, description: null
, encoding: '7BIT'
@ -119,14 +117,12 @@ A message structure with multiple parts might look something like the following:
, md5: null
, disposition: null
, language: null
, location: null
}
]
, [ { partID: '1.2'
, type:
{ name: 'text/html'
, type: 'text'
, subtype: 'html'
, params: { charset: 'ISO-8859-1' }
}
, id: null
, description: null
, encoding: 'QUOTED-PRINTABLE'
@ -135,15 +131,13 @@ A message structure with multiple parts might look something like the following:
, md5: null
, disposition: null
, language: null
, location: null
}
]
]
, [ { partID: '2'
, type:
{ name: 'application/octet-stream'
, type: 'application'
, subtype: 'octet-stream'
, params: { name: 'somefile' }
}
, id: null
, description: null
, encoding: 'BASE64'
@ -165,10 +159,9 @@ Each message part is identified by a partID which is used when you want to fetch
The structure of a message with only one part will simply look something like this:
[ { partID: '1'
, type:
{ name: 'text/plain'
, type: 'text'
, subtype: 'plain'
, params: { charset: 'ISO-8859-1' }
}
, id: null
, description: null
, encoding: '7BIT'
@ -177,7 +170,6 @@ The structure of a message with only one part will simply look something like th
, md5: null
, disposition: null
, language: null
, location: null
}
]
Therefore, an easy way to check for a multipart message is to check if the structure length is >1.
@ -216,7 +208,7 @@ ImapConnection Properties
* **namespaces** - An Object containing 3 properties, one for each namespace type: personal (mailboxes that belong to the logged in user), other (mailboxes that belong to other users that the logged in user has access to), and shared (mailboxes that are accessible by any logged in user). The value of each of these properties is an Array of namespace Objects containing necessary information about each available namespace. There should always be one entry (although the IMAP spec allows for more, it doesn't seem to be very common) in the personal namespace list (if the server supports namespaces) with a blank namespace prefix. Each namespace Object has the following format (with example values):
{ prefix: '' // A String containing the prefix to use to access mailboxes in this namespace
, delimiter: '/' // A String containing the hierarchy delimiter for this namespace, or Boolean false for a flat namespace with no hierarchy
, delim: '/' // A String containing the hierarchy delimiter for this namespace, or Boolean false for a flat namespace with no hierarchy
, extensions: [ // An Array of namespace extensions supported by this namespace, or null if none are specified
{ name: 'X-FOO-BAR' // A String indicating the extension name
, params: [ 'BAZ' ] // An Array of Strings containing the parameters for this extension, or null if none are specified

517
imap.js
Unescape Escape View File

@ -906,79 +906,31 @@ function validateUIDList(uids) {
}
function parseNamespaces(str, namespaces) {
// str contains 3 parenthesized lists (or NIL) describing the personal, other users', and shared namespaces available
var idxNext, idxNextName, idxNextVal, strNamespace, strList, details, types = Object.keys(namespaces), curType = 0;
while (str.length > 0) {
if (str.substr(0, 3) === 'NIL')
idxNext = 3;
else {
idxNext = getNextIdxParen(str)+1;
// examples: (...)
// (...)(...)
strList = str.substring(1, idxNext-1);
// parse each namespace for the current type
while (strList.length > 0) {
details = {};
idxNextName = getNextIdxParen(strList)+1;
// examples: "prefix" "delimiter"
// "prefix" NIL
// "prefix" NIL "X-SOME-EXT" ("FOO" "BAR" "BAZ")
strNamespace = strList.substring(1, idxNextName-1);
// prefix
idxNextVal = getNextIdxQuoted(strNamespace)+1;
details.prefix = strNamespace.substring(1, idxNextVal-1);
strNamespace = strNamespace.substr(idxNextVal).trim();
// delimiter
if (strNamespace.substr(0, 3) === 'NIL') {
details.delim = false;
strNamespace = strNamespace.substr(3).trim();
} else {
idxNextVal = getNextIdxQuoted(strNamespace)+1;
details.delim = strNamespace.substring(1, idxNextVal-1);
strNamespace = strNamespace.substr(idxNextVal).trim();
}
// [extensions]
if (strNamespace.length > 0) {
details.extensions = [];
var extension;
while (strNamespace.length > 0) {
extension = { name: '', params: null };
// name
idxNextVal = getNextIdxQuoted(strNamespace)+1;
extension.name = strNamespace.substring(1, idxNextVal-1);
strNamespace = strNamespace.substr(idxNextVal).trim();
// params
idxNextVal = getNextIdxParen(strNamespace)+1;
var strParams = strNamespace.substring(1, idxNextVal-1), idxNextParam;
if (strParams.length > 0) {
extension.params = [];
while (strParams.length > 0) {
idxNextParam = getNextIdxQuoted(strParams)+1;
extension.params.push(strParams.substring(1, idxNextParam-1));
strParams = strParams.substr(idxNextParam).trim();
}
var result = parseExpr(str);
for (var grp=0; grp<3; ++grp) {
if (Array.isArray(result[grp])) {
var vals = [];
for (var i=0,len=result[grp].length; i<len; ++i) {
var val = { prefix: result[grp][i][0], delim: result[grp][i][1] };
if (result[grp][i].length > 2) {
// extension data
val.extensions = [];
for (var j=2,len2=result[grp][i].length; j<len2; j+=2) {
val.extensions.push({
name: result[grp][i][j],
flags: result[grp][i][j+1]
});
}
strNamespace = strNamespace.substr(idxNextVal).trim();
details.extensions.push(extension);
}
} else
details.extensions = null;
namespaces[types[curType]].push(details);
strList = strList.substr(idxNextName).trim();
vals.push(val);
}
curType++;
if (grp === 0)
namespaces.personal = vals;
else if (grp === 1)
namespaces.other = vals;
else if (grp === 2)
namespaces.shared = vals;
}
str = str.substr(idxNext).trim();
}
}
@ -1032,249 +984,160 @@ function parseFetch(str, literalData, fetchData) {
}
}
function parseBodyStructure(str, prefix, partID) {
var retVal = [], lastIndex;
prefix = (prefix !== undefined ? prefix : '');
partID = (partID !== undefined ? partID : 1);
if (str[0] === '(') { // multipart
var extensionData = {
type: null, // required
params: null, disposition: null, language: null, location: null // optional and may be omitted completely
};
// Recursively parse each part
while (str[0] === '(') {
lastIndex = getNextIdxParen(str);
retVal.push(parseBodyStructure(str.substr(1, lastIndex-1), prefix + (prefix !== '' ? '.' : '') + (partID++).toString(), 1));
str = str.substr(lastIndex+1).trim();
}
// multipart type
lastIndex = getNextIdxQuoted(str);
extensionData.type = str.substring(1, lastIndex).toLowerCase();
str = str.substr(lastIndex+1).trim();
// [parameters]
if (str.length > 0) {
if (str[0] === '(') {
var isKey = true, key;
str = str.substr(1);
extensionData.params = {};
while (str[0] !== ')') {
lastIndex = getNextIdxQuoted(str);
if (isKey)
key = str.substring(1, lastIndex).toLowerCase();
else
extensionData.params[key] = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
isKey = !isKey;
}
str = str.substr(1).trim();
} else
str = str.substr(4);
// [disposition]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
extensionData.disposition = { type: null, params: null };
str = str.substr(1);
lastIndex = getNextIdxQuoted(str);
extensionData.disposition.type = str.substring(1, lastIndex).toLowerCase();
str = str.substr(lastIndex+1).trim();
if (str[0] === '(') {
var isKey = true, key;
str = str.substr(1);
extensionData.disposition.params = {};
while (str[0] !== ')') {
lastIndex = getNextIdxQuoted(str);
if (isKey)
key = str.substring(1, lastIndex).toLowerCase();
else
extensionData.disposition.params[key] = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
isKey = !isKey;
}
str = str.substr(2).trim();
} else
str = str.substr(4).trim();
} else
str = str.substr(4);
// [language]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
extensionData.language = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
} else
str = str.substr(4);
// [location]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
extensionData.location = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
function parseBodyStructure(cur, prefix, partID) {
var ret = [];
if (typeof cur === 'string') {
var result = parseExpr(cur);
if (result.length)
ret = parseBodyStructure(result, '', 1);
} else {
var part, partLen = cur.length, next;
if (Array.isArray(cur[0])) { // multipart
next = -1;
while (Array.isArray(cur[++next]))
ret.push(parseBodyStructure(cur[next], prefix + (prefix !== '' ? '.' : '') + (partID++).toString(), 1));
part = { type: cur[next++].toLowerCase() };
if (partLen > next) {
if (Array.isArray(cur[next])) {
part.params = {};
for (var i=0,len=cur[next].length; i<len; i+=2)
part.params[cur[next][i].toLowerCase()] = cur[next][i+1];
} else
str = str.substr(4);
}
part.params = cur[next];
}
}
}
retVal.unshift(extensionData);
} else { // single part
var part = {
partID: (prefix !== '' ? prefix : '1'), // the path identifier for this part, useful for fetching specific parts of a message
type: { name: null, params: null }, // content type and parameters (NIL or otherwise)
id: null, description: null, encoding: null, size: null, lines: null, // required -- NIL or otherwise
md5: null, disposition: null, language: null, location: null // optional extension data that may be omitted entirely
},
lastIndex = getNextIdxQuoted(str),
contentTypeMain = str.substring(1, lastIndex),
contentTypeSub;
str = str.substr(lastIndex+1).trim();
lastIndex = getNextIdxQuoted(str);
contentTypeSub = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
// content type
part.type.name = contentTypeMain.toLowerCase() + '/' + contentTypeSub.toLowerCase();
// content type parameters
if (str[0] === '(') {
var isKey = true, key;
str = str.substr(1);
part.type.params = {};
while (str[0] !== ')') {
lastIndex = getNextIdxQuoted(str);
if (isKey)
key = str.substring(1, lastIndex).toLowerCase();
next = 7;
part = {
// the path identifier for this part, useful for fetching specific
// parts of a message
partID: (prefix !== '' ? prefix : '1'),
// required fields as per RFC 3501 -- null or otherwise
type: cur[0].toLowerCase(), subtype: cur[1].toLowerCase(),
params: null, id: cur[3], description: cur[4], encoding: cur[5],
size: cur[6]
}
if (Array.isArray(cur[2])) {
part.params = {};
for (var i=0,len=cur[2].length; i<len; i+=2)
part.params[cur[2][i].toLowerCase()] = cur[2][i+1];
}
if (part.type === 'message' && part.subtype === 'rfc822') {
// envelope
if (partLen > next && Array.isArray(cur[next])) {
part.envelope = {};
for (var i=0,field,len=cur[next].length; i<len; ++i) {
if (i === 0)
part.envelope.date = cur[next][i];
else if (i === 1)
part.envelope.subject = cur[next][i];
else if (i >= 2 && i <= 7) {
var val = cur[next][i];
if (Array.isArray(val)) {
var addresses = [], inGroup = false, curGroup;
for (var j=0,len2=val.length; j<len2; ++j) {
if (val[j][3] === null) { // start group addresses
inGroup = true;
curGroup = {
group: val[j][2],
addresses: []
};
} else if (val[j][2] === null) { // end of group addresses
inGroup = false;
addresses.push(curGroup);
} else { // regular user address
var info = {
name: val[j][0],
mailbox: val[j][2],
host: val[j][3]
};
if (inGroup)
curGroup.addresses.push(info);
else
part.type.params[key] = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
isKey = !isKey;
addresses.push(info);
}
}
val = addresses;
}
if (i === 2)
part.envelope.from = val;
else if (i === 3)
part.envelope.sender = val;
else if (i === 4)
part.envelope.replyTo = val;
else if (i === 5)
part.envelope.to = val;
else if (i === 6)
part.envelope.cc = val;
else if (i === 7)
part.envelope.bcc = val;
} else if (i === 8)
part.envelope.inReplyTo = cur[next][i]; // message ID being replied to
else if (i === 9)
part.envelope.messageID = cur[next][i];
else
break;
}
str = str.substr(2);
} else
str = str.substr(4);
// content id
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
part.id = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
} else
str = str.substr(4);
// content description
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
part.description = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
} else
str = str.substr(4);
part.envelope = null;
++next;
// content encoding
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
part.encoding = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
// body
if (partLen > next && Array.isArray(cur[next])) {
part.body = parseBodyStructure(cur[next], prefix + (prefix !== '' ? '.' : '') + (partID++).toString(), 1);
} else
str = str.substr(4);
// size of content encoded in bytes
if (str.substr(0, 3) !== 'NIL') {
lastIndex = 0;
while (str.charCodeAt(lastIndex) >= 48 && str.charCodeAt(lastIndex) <= 57)
lastIndex++;
part.size = parseInt(str.substring(0, lastIndex));
str = str.substr(lastIndex).trim();
} else
str = str.substr(4);
// [# of lines]
if (part.type.name.indexOf('text/') === 0) {
if (str.substr(0, 3) !== 'NIL') {
lastIndex = 0;
while (str.charCodeAt(lastIndex) >= 48 && str.charCodeAt(lastIndex) <= 57)
lastIndex++;
part.lines = parseInt(str.substring(0, lastIndex));
str = str.substr(lastIndex).trim();
} else
str = str.substr(4);
}
// [md5 hash of content]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
part.md5 = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
} else
str = str.substr(4);
// [disposition]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
part.disposition = { type: null, params: null };
str = str.substr(1);
lastIndex = getNextIdxQuoted(str);
part.disposition.type = str.substring(1, lastIndex).toLowerCase();
str = str.substr(lastIndex+1).trim();
if (str[0] === '(') {
var isKey = true, key;
str = str.substr(1);
part.disposition.params = {};
while (str[0] !== ')') {
lastIndex = getNextIdxQuoted(str);
if (isKey)
key = str.substring(1, lastIndex).toLowerCase();
else
part.disposition.params[key] = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
isKey = !isKey;
part.body = null;
++next;
}
str = str.substr(2).trim();
} else
str = str.substr(4).trim();
} else
str = str.substr(4);
// [language]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
if (str[0] === '(') {
part.language = [];
str = str.substr(1);
while (str[0] !== ')') {
lastIndex = getNextIdxQuoted(str);
part.language.push(str.substring(1, lastIndex));
str = str.substr(lastIndex+1).trim();
if ((part.type === 'text'
|| (part.type === 'message' && part.subtype === 'rfc822'))
&& partLen > next)
part.lines = cur[next++];
if (partLen > next)
part.md5 = cur[next++];
}
} else {
lastIndex = getNextIdxQuoted(str);
part.language = [str.substring(1, lastIndex)];
str = str.substr(lastIndex+1).trim();
// add any extra fields that may or may not be omitted entirely
parseStructExtra(part, partLen, cur, next);
ret.unshift(part);
}
return ret;
}
function parseStructExtra(part, partLen, cur, next) {
if (partLen > next) {
// disposition
// null or a special k/v list with these kinds of values:
// e.g.: ['Foo', null]
// ['Foo', ['Bar', 'Baz']]
// ['Foo', ['Bar', 'Baz', 'Bam', 'Pow']]
if (Array.isArray(cur[next])) {
part.disposition = {};
if (Array.isArray(cur[next][1])) {
for (var i=0,len=cur[next][1].length; i<len; i+=2)
part.disposition[cur[next][1][i].toLowerCase()] = cur[next][1][i+1];
} else
str = str.substr(4);
// [location]
if (str.length > 0) {
if (str.substr(0, 3) !== 'NIL') {
lastIndex = getNextIdxQuoted(str);
part.location = str.substring(1, lastIndex);
str = str.substr(lastIndex+1).trim();
part.disposition[cur[next][0]] = cur[next][1];
} else
str = str.substr(4);
}
}
}
part.disposition = cur[next];
++next;
}
if (partLen > next) {
// language can be a string or a list of one or more strings, so let's
// make this more consistent ...
if (cur[next] !== null)
part.language = (Array.isArray(cur[next]) ? cur[next] : [cur[next]]);
else
part.language = null;
++next;
}
retVal.push(part);
if (partLen > next)
part.location = cur[next++];
if (partLen > next) {
// extension stuff introduced by later RFCs
// this can really be any value: a string, number, or (un)nested list
// let's not parse it for now ...
part.extensions = cur[next];
}
return retVal;
}
String.prototype.explode = function(delimiter, limit) {
@ -1315,20 +1178,52 @@ function up(str) {
return str.toUpperCase();
}
function getNextIdxQuoted(str) {
var index = -1, countQuote = 0;
for (var i=0,len=str.length; i<len; i++) {
if (str[i] === '"') {
if (i > 0 && str[i-1] === "\\")
continue;
countQuote++;
}
if (countQuote === 2) {
index = i;
break;
}
}
return index;
function parseExpr(o, result, start) {
start = start || 0;
var inQuote = false, lastPos = start - 1, isTop = false;
if (!result)
result = new Array();
if (typeof o === 'string') {
var state = new Object();
state.str = o;
o = state;
isTop = true;
}
for (var i=start,len=o.str.length; i<len; ++i) {
if (!inQuote) {
if (o.str[i] === '"')
inQuote = true;
else if (o.str[i] === ' ' || o.str[i] === ')') {
if (i - (lastPos+1) > 0)
result.push(convStr(o.str.substring(lastPos+1, i)));
if (o.str[i] === ')')
return i;
lastPos = i;
} else if (o.str[i] === '(') {
var innerResult = [];
i = parseExpr(o, innerResult, i+1);
lastPos = i;
result.push(innerResult);
}
} else if (o.str[i] === '"' &&
(o.str[i-1] &&
(o.str[i-1] !== '\\' || (o.str[i-2] && o.str[i-2] === '\\'))))
inQuote = false;
if (i+1 === len && len - (lastPos+1) > 0)
result.push(convStr(o.str.substring(lastPos+1)));
}
return (isTop ? result : start);
}
function convStr(str) {
if (str[0] === '"')
return str.substring(1, str.length-1);
else if (str === 'NIL')
return null;
else if (/^\d+$/.test(str))
return parseInt(str, 10);
else
return str;
}
function getNextIdxParen(str) {

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