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nsXmlRpcClient.js
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2000-09-15
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/*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
* the specific language governing rights and limitations under the License.
*
* The Original Code is Mozilla XML-RPC Client component.
*
* The Initial Developer of the Original Code is Digital Creations 2, Inc.
* Portions created by Digital Creations 2, Inc. are Copyright (C) 2000 Digital
* Creations 2, Inc. All Rights Reserved.
*
* Contributor(s): Martijn Pieters <mj@digicool.com> (original author)
*/
/*
* nsXmlRpcClient XPCOM component
* Version: $Revision: 1.12 $
*
* $Id: nsXmlRpcClient.js,v 1.12 2000/09/15 09:15:30 mj%digicool.com Exp $
*/
/*
* Constants
*/
const XMLRPCCLIENT_CONTRACTID = '@mozilla.org/xml-rpc/client;1';
const XMLRPCCLIENT_CID =
Components.ID('{37127241-1e6e-46aa-ba87-601d41bb47df}');
const XMLRPCCLIENT_IID = Components.interfaces.nsIXmlRpcClient;
const XMLRPCFAULT_CONTRACTID = '@mozilla.org/xml-rpc/fault;1';
const XMLRPCFAULT_CID =
Components.ID('{691cb864-0a7e-448c-98ee-4a7f359cf145}');
const XMLRPCFAULT_IID = Components.interfaces.nsIXmlRpcFault;
const DEBUG = false;
const DEBUGPARSE = false;
/*
* Class definitions
*/
/* The nsXmlRpcFault class constructor. */
function nsXmlRpcFault() {}
/* the nsXmlRpcFault class def */
nsXmlRpcFault.prototype = {
faultCode: 0,
faultString: '',
init: function(faultCode, faultString) {
this.faultCode = faultCode;
this.faultString = faultString;
},
toString: function() {
return '<XML-RPC Fault: (' + this.faultCode + ') ' +
this.faultString + '>';
},
// nsISupports interface
QueryInterface: function(iid) {
if (!iid.equals(Components.interfaces.nsISupports) &&
!iid.equals(XMLRPCFAULT_IID))
throw Components.results.NS_ERROR_NO_INTERFACE;
return this;
}
};
/* The nsXmlRpcClient class constructor. */
function nsXmlRpcClient() {}
/* the nsXmlRpcClient class def */
nsXmlRpcClient.prototype = {
_serverUrl: null,
init: function(serverURL) {
var oURL = createInstance('@mozilla.org/network/standard-url;1',
'nsIURL');
oURL.spec = serverURL;
// Make sure it is a complete spec
// Note that we don't care what the scheme is otherwise.
// Should we care? POST works only on http and https..
if (!oURL.scheme) oURL.scheme = 'http';
if (oURL.scheme != 'http')
throw Components.Exceptions('Only HTTP is supported');
this._serverUrl = oURL;
},
get serverUrl() { return this._serverUrl; },
// BROKEN. Bug 37913
call: function(methodName, methodArgs, count) {
debug('call');
// Check for call in progress.
if (this._inProgress)
throw Components.Exception('Call in progress!');
// Check for the server URL;
if (!this._serverUrl)
throw Components.Exception('Not initilized');
this._inProgress = true;
// Clear state.
this._status = null;
this._errorMsg = null;
debug('Arguments: ' + methodArgs);
// Generate request body
var xmlWriter = new XMLWriter();
this._generateRequestBody(xmlWriter, methodName, methodArgs);
var requestBody = xmlWriter.data;
debug('Request: ' + requestBody);
var channel = this._getChannel(requestBody);
debug('Do the deed.');
var input = channel.openInputStream();
input = toScriptableStream(input);
var now = new Date()
// This is broken! See bug 11859
// yes, if we use asyncCall on ourselves, we still don't
// work. Valeski calls this an event pump blocking problem.
while (!input.available()) { // Wait for data
if (new Date() - now > 1 * 60 * 1000) {
this._inProgress = false;
throw Components.Exception('Connection timed out');
}
}
this._reponseStatus = channel.responseStatus;
this._responseString = channel.responseString;
// Check for a 200 response.
if (channel.responseStatus != 200) {
this._status = Components.results.NS_ERROR_FAILURE;
this._errorMsg = 'Server returned unexpected status ' +
channel.responseStatus;
this._inProgress = false;
throw Components.Exception('Server returned unexpected status ' +
channel.responseStatus);
}
// check content type
if (channel.contentType != 'text/xml') {
this._status = Components.results.NS_ERROR_FAILURE;
this._errorMsg = 'Server returned unexpected content-type ' +
channel.contentType;
this._inProgress = false;
throw Components.Exception('Server returned unexpected ' +
'content-type ' + channel.contentType);
}
debug('Viable response. Let\'s parse!');
debug('Content length = ' + channel.contentLength);
try {
this._parseResponse(toScriptableStream(inStr),
channel.contentLength);
debug('Parse finished');
debug('Fault? ' + this._fault);
debug('Result? ' + this._result);
} catch(ex) {
this._status = ex.result;
this._errorMsg = ex.message;
throw ex;
} finally {
this._inProgress = false;
}
return this._result;
},
// Internal copy of the status, so's we can throw it to the syncnronous
// caller.
_status: null,
_errorMsg: null,
_listener: null,
_seenStart: false,
asyncCall: function(listener, context, methodName, methodArgs, count) {
debug('asyncCall');
// Check for call in progress.
if (this._inProgress)
throw Components.Exception('Call in progress!');
// Check for the server URL;
if (!this._serverUrl)
throw Components.Exception('Not initilized');
this._inProgress = true;
// Clear state.
this._status = null;
this._errorMsg = null;
this._listener = listener;
this._seenStart = false;
debug('Arguments: ' + methodArgs);
// Generate request body
var xmlWriter = new XMLWriter();
this._generateRequestBody(xmlWriter, methodName, methodArgs);
var requestBody = xmlWriter.data;
debug('Request: ' + requestBody);
var chann = this._getChannel(requestBody);
// And...... call!
chann.asyncRead(this, context);
},
// Return a HTTP channel ready for POSTing.
_getChannel: function(request) {
// Set up channel.
var ioService = getService('@mozilla.org/network/io-service;1',
'nsIIOService');
var atomService = getService('@mozilla.org/atom-service;1',
'nsIAtomService');
var chann = ioService.newChannelFromURI(this._serverUrl)
.QueryInterface(Components.interfaces.nsIHTTPChannel);
// Set the request method.
chann.SetRequestMethod(atomService.getAtom('POST'));
// Create a stream out of the request and attach it to the channel
// Note: pending bug #37773, an extra \r\n needs to be added.
var handler = ioService.getProtocolHandler(this._serverUrl.scheme)
.QueryInterface(Components.interfaces.nsIHTTPProtocolHandler);
var postStream = handler.NewPostDataStream(false, '\r\n' + request,
handler.ENCODE_NORMAL);
chann.UploadStream = postStream;
// Set the request headers
chann.SetRequestHeader(atomService.getAtom('content-type'), 'text/xml');
chann.SetRequestHeader(atomService.getAtom('content-length'),
request.length);
return chann;
},
// Flag indicating wether or not we are calling the server.
_inProgress: false,
get inProgress() { return this._inProgress; },
// nsIStreamListener interface, so's we know about the pending request.
onStartRequest: function(channel, ctxt) {
debug('Start Request')
}, // Do exactly nada.
// End of the request
onStopRequest: function(channel, ctxt, status, errorMsg) {
debug('Stop Request');
if (!this._inProgress) return; // No longer interested.
this._inProgress = false;
this._parser = null;
if (status) {
debug('Non-zero status: (' + status.toString(16) + ') ' + errorMsg);
this._status = status;
this._errorMsg = errorMsg;
try { this._listener.onError(this, ctxt, status, errorMsg); }
catch (ex) {
debug('Exception in listener.onError: ' + ex);
}
return;
}
// All done.
debug('Parse finished');
if (this._foundFault) {
try {
this._fault = createInstance(XMLRPCFAULT_CONTRACTID,
'nsIXmlRpcFault');
this._fault.init(this._result.getValue('faultCode').data,
this._result.getValue('faultString').data);
this._result = null;
} catch(e) {
this._fault = null;
this._result = null;
throw Components.Exception('Could not parse response');
try {
this._listener.onError(this, ctxt,
Components.results.NS_ERROR_FAIL,
'Server returned invalid Fault');
}
catch(ex) {
debug('Exception in listener.onError: ' + ex);
}
}
debug('Fault: ' + this._fault);
try { this._listener.onFault(this, ctxt, this._fault); }
catch(ex) {
debug('Exception in listener.onFault: ' + ex);
}
} else {
debug('Result: ' + this._result);
try {
this._listener.onResult(this, ctxt, this._result);
} catch (ex) {
debug('Exception in listener.onResult: ' + ex);
}
}
},
_parser: null,
_foundFault: false,
// Houston, we have data.
onDataAvailable: function(channel, ctxt, inStr, sourceOffset, count) {
debug('Data available (' + sourceOffset + ', ' + count + ')');
if (!this._inProgress) return; // No longer interested.
if (!this._seenStart) {
// First time round
this._seenStart = true;
// Store request status and message.
channel = channel
.QueryInterface(Components.interfaces.nsIHTTPChannel);
this._reponseStatus = channel.responseStatus;
this._responseString = channel.responseString;
// Check for a 200 response.
if (channel.responseStatus != 200) {
this._status = Components.results.NS_ERROR_FAILURE;
this._errorMsg = 'Server returned unexpected status ' +
channel.responseStatus;
this._inProgress = false;
try {
this._listener.onError(this, ctxt,
Components.results.NS_ERROR_FAILURE,
'Server returned unexpected status ' +
channel.responseStatus);
} catch (ex) {
debug('Exception in listener.onError: ' + ex);
}
return;
}
// check content type
if (channel.contentType != 'text/xml') {
this._status = Components.results.NS_ERROR_FAILURE;
this._errorMsg = 'Server returned unexpected content-type ' +
channel.contentType;
this._inProgress = false;
try {
this._listener.onError(this, ctxt,
Components.results.NS_ERROR_FAILURE,
'Server returned unexpected content-type ' +
channel.contentType);
} catch (ex) {
debug('Exception in listener.onError: ' + ex);
}
return;
}
debug('Viable response. Let\'s parse!');
debug('Content length = ' + channel.contentLength);
this._parser = new SimpleXMLParser(toScriptableStream(inStr),
channel.contentLength);
this._parser.setDocumentHandler(this);
// Make sure state is clean
this._valueStack = [];
this._currValue = null;
this._cdata = null;
this._foundFault = false;
}
debug('Cranking up the parser, window = ' + count);
try {
this._parser.parse(count);
} catch(ex) {
debug('Parser exception: ' + ex);
this._status = ex.result;
this._errorMsg = ex.message;
try {
this._listener.onError(this, ctxt, ex.result, ex.message);
} catch(ex) {
debug('Exception in listener.onError: ' + ex);
}
this._inProgress = false;
this._parser = null;
}
},
_fault: null,
_result: null,
_responseStatus: null,
_responseString: null,
get fault() { return this._fault; },
get result() { return this._result; },
get responseStatus() { return this._responseStatus; },
get responseString() { return this._responseString; },
/* Convenience. Create an appropriate XPCOM object for a given type */
INT: 1,
BOOLEAN: 2,
STRING: 3,
DOUBLE: 4,
DATETIME: 5,
ARRAY: 6,
STRUCT: 7,
BASE64: 8, // Not part of nsIXmlRpcClient interface, internal use.
createType: function(type, uuid) {
const SUPPORTSID = '@mozilla.org/supports-';
switch(type) {
case this.INT:
uuid.value = Components.interfaces.nsISupportsPRInt32
return createInstance(SUPPORTSID + 'PRInt32;1',
'nsISupportsPRInt32');
case this.BOOLEAN:
uuid.value = Components.interfaces.nsISupportsPRBool
return createInstance(SUPPORTSID + 'PRBool;1',
'nsISupportsPRBool');
case this.STRING:
uuid.value = Components.interfaces.nsISupportsString
return createInstance(SUPPORTSID + 'string;1',
'nsISupportsString');
case this.DOUBLE:
uuid.value = Components.interfaces.nsISupportsDouble
return createInstance(SUPPORTSID + 'double;1',
'nsISupportsDouble');
case this.DATETIME:
uuid.value = Components.interfaces.nsISupportsPRTime
return createInstance(SUPPORTSID + 'PRTime;1',
'nsISupportsPRTime');
case this.ARRAY:
uuid.value = Components.interfaces.nsISupportsArray
return createInstance(SUPPORTSID + 'array;1',
'nsISupportsArray');
case this.STRUCT:
return createInstance('@mozilla.org/dictionary;1',
'nsIDictionary');
default: throw Components.Exception('Unsupported type');
}
},
// nsISupports interface
QueryInterface: function(iid) {
if (!iid.equals(Components.interfaces.nsISupports) &&
!iid.equals(XMLRPCCLIENT_IID) &&
!iid.equals(Components.interfaces.nsIXmlRpcClientListener) &&
!iid.equals(Components.interfaces.nsIStreamObserver) &&
!iid.equals(Components.interfaces.nsIStreamListener))
throw Components.results.NS_ERROR_NO_INTERFACE;
return this;
},
/* Generate the XML-RPC request body */
_generateRequestBody: function(writer, methodName, methodArgs) {
writer.startElement('methodCall');
writer.startElement('methodName');
writer.write(methodName);
writer.endElement('methodName');
writer.startElement('params');
for (var i in methodArgs) {
writer.startElement('param');
this._generateArgumentBody(writer, methodArgs[i]);
writer.endElement('param');
}
writer.endElement('params');
writer.endElement('methodCall');
},
/* Write out a XML-RPC parameter value */
_generateArgumentBody: function(writer, obj) {
writer.startElement('value');
var sType = this._typeOf(obj);
switch (sType) {
case 'PRUint8':
case 'PRUint16':
case 'PRInt16':
case 'PRInt32':
obj=obj.QueryInterface(Components.interfaces['nsISupports' +
sType]);
writer.startElement('i4');
writer.write(obj.toString());
writer.endElement('i4');
break;
case 'PRBool':
obj=obj.QueryInterface(Components.interfaces.nsISupportsPRBool);
writer.startElement('boolean');
writer.write(obj.data ? '1' : '0');
writer.endElement('boolean');
break;
case 'Char':
case 'String':
obj=obj.QueryInterface(Components.interfaces['nsISupports' +
sType]);
writer.startElement('string');
writer.write(obj.toString());
writer.endElement('string');
break;
case 'Float':
case 'Double':
obj=obj.QueryInterface(Components.interfaces['nsISupports' +
sType]);
writer.startElement('double');
writer.write(obj.toString());
writer.endElement('double');
break;
case 'PRTime':
obj = obj.QueryInterface(
Components.interfaces.nsISupportsPRTime);
var date = new Date(obj.data)
writer.startElement('dateTime.iso8601');
writer.write(iso8601Format(date));
writer.endElement('dateTime.iso8601');
break;
case 'InputStream':
obj = obj.QueryInterface(Components.interfaces.nsIInputStream);
obj = toScriptableStream(obj);
writer.startElement('base64');
streamToBase64(obj, writer);
writer.endElement('base64');
break;
case 'Array':
obj = obj.QueryInterface(
Components.interfaces.nsISupportsArray);
writer.startElement('array');
writer.startElement('data');
for (var i = 0; i < obj.Count(); i++)
this._generateArgumentBody(writer, obj.GetElementAt(i));
writer.endElement('data');
writer.endElement('array');
break;
case 'Dictionary':
obj = obj.QueryInterface(Components.interfaces.nsIDictionary);
writer.startElement('struct');
var keys = obj.getKeys({});
for (var i in keys) {
writer.startElement('member');
writer.startElement('name');
writer.write(keys[i]);
writer.endElement('name');
this._generateArgumentBody(writer, obj.getValue(keys[i]));
writer.endElement('member');
}
writer.endElement('struct');
break;
default:
throw Components.Exception('Unsupported argument', null, null,
obj);
}
writer.endElement('value');
},
/* Determine type of a nsISupports primitive, array or dictionary. */
_typeOf: function(obj) {
// XPConnect alows JS to pass in anything, because we are a regular
// JS object to it. So we have to test rigorously.
if (typeof obj != 'object') return 'Unknown';
// Anything else not nsISupports is not allowed.
if (typeof obj.QueryInterface != 'function') return 'Unknown';
// Now we will have to eliminate by trying all possebilities.
try {
obj.QueryInterface(Components.interfaces.nsISupportsPRUint8);
return 'PRUint8';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsPRUint16);
return 'PRUint16';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsPRInt16);
return 'PRInt16';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsPRInt32);
return 'PRInt32';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsPRBool);
return 'PRBool';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsChar);
return 'Char';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsString);
return 'String';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsFloat);
return 'Float';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsDouble);
return 'Double';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsPRTime);
return 'PRTime';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsIInputStream);
return 'InputStream';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsISupportsArray);
return 'Array';
} catch(e) {}
try {
obj.QueryInterface(Components.interfaces.nsIDictionary);
return 'Dictionary';
} catch(e) {}
// Not a supported type
return 'Unknown';
},
/* Parse the XML-RPC response */
// Only on Sync calls.
_parseResponse: function(stream, length) {
debug('Creating parser ... ');
var parser = new SimpleXMLParser(stream, length);
parser.setDocumentHandler(this);
// Make sure state is clean
this._valueStack = [];
this._currValue = null;
this._cdata = null;
this._foundFault = false;
debug('Cranking up the parser');
parser.parse(length);
if (this._foundFault) {
try {
this._fault = createInstance(XMLRPCFAULT_CONTRACTID,
'nsIXmlRpcFault');
this._fault.init(this._result.getValue('faultCode').data,
this._result.getValue('faultString').data);
this._result = null;
} catch(e) {
this._fault = null;
this._result = null;
throw Components.Exception('Could not parse response');
}
}
},
// Response parsing state
_valueStack: [],
_currValue: null,
_cdata: null,
/* SAX documentHandler interface (well, sorta) */
characters: function(chars) {
if (DEBUGPARSE) debug('character data: ' + chars);
if (this._cdata == null) return;
this._cdata += chars;
},
startElement: function(name) {
if (DEBUGPARSE) debug('Start element ' + name);
switch (name) {
case 'fault':
this._foundFault = true;
break;
case 'value':
var val = new Value();
this._valueStack.push(val);
this._currValue = val;
this._cdata = '';
break;
case 'name':
this._cdata = '';
break;
case 'i4':
case 'int':
this._currValue.type = this.INT;
break;
case 'boolean':
this._currValue.type = this.BOOLEAN;
break;
case 'double':
this._currValue.type = this.DOUBLE;
break;
case 'dateTime.iso8601':
this._currValue.type = this.DATETIME;
break;
case 'base64':
this._currValue.type = this.BASE64;
break;
case 'struct':
this._currValue.type = this.STRUCT;
break;
case 'array':
this._currValue.type = this.ARRAY;
break;
}
},
endElement: function(name) {
if (DEBUGPARSE) debug('End element ' + name);
switch (name) {
case 'value':
// take cdata and put it in this value;
if (this._currValue.type != this.ARRAY &&
this._currValue.type != this.STRUCT) {
this._currValue.value = this._cdata;
this._cdata = null;
}
// Find out if this is the end value
// Note that we treat a struct differently, see 'member'
var depth = this._valueStack.length;
if (depth < 2 ||
this._valueStack[depth - 2].type != this.STRUCT) {
var val = this._currValue;
this._valueStack.pop();
if (depth < 2) {
if (DEBUG) debug('Found result');
// This is the top level object
this._result = val.value;
this._currValue = null;
} else {
// This is an array element. Add it.
this._currValue =
this._valueStack[this._valueStack.length - 1];
this._currValue.appendValue(val.value);
}
}
break;
case 'member':
var val = this._currValue;
this._valueStack.pop();
this._currValue = this._valueStack[this._valueStack.length - 1];
this._currValue.appendValue(val.value);
break;
case 'name':
this._currValue.name = this._cdata;
this._cdata = null;
break;
}
}
};
/* The XMLWriter class constructor */
function XMLWriter() {
// We assume for now that all data is already in ISO-8859-1.
this.data = '<?xml version="1.0" encoding="ISO-8859-1"?>\n';
}
/* The XMLWriter class def */
XMLWriter.prototype = {
data: '',
startElement: function(element) {
this.data += '<' + element + '>';
},
endElement: function(element) {
this.data += '</' + element + '>';
},
write: function(text) {
for (var i in text) {
var c = text.charAt(i);
switch (c) {
case '<':
this.data += '<';
break;
case '&':
this.data += '&';
break;
default:
this.data += c;
}
}
},
markup: function(text) { this.data += text }
};
/* The Value class contructor */
function Value() { this.type = this.STRING; };
/* The Value class def */
Value.prototype = {
INT: nsXmlRpcClient.prototype.INT,
BOOLEAN: nsXmlRpcClient.prototype.BOOLEAN,
STRING: nsXmlRpcClient.prototype.STRING,
DOUBLE: nsXmlRpcClient.prototype.DOUBLE,
DATETIME: nsXmlRpcClient.prototype.DATETIME,
ARRAY: nsXmlRpcClient.prototype.ARRAY,
STRUCT: nsXmlRpcClient.prototype.STRUCT,
BASE64: nsXmlRpcClient.prototype.BASE64,
_createType: nsXmlRpcClient.prototype.createType,
name: null,
_value: null,
get value() { return this._value; },
set value(val) {
// accepts [0-9]+ or x[0-9a-fA-F]+ and returns the character.
function entityTrans(substr, code) {
return String.fromCharCode("0" + code);
}
switch (this.type) {
case this.STRING:
val = val.replace(/([0-9]+);/g, entityTrans);
val = val.replace(/(x[0-9a-fA-F]+);/g, entityTrans);
val = val.replace(/</g, '<');
val = val.replace(/>/g, '>');
val = val.replace(/&/g, '&');
this._value.data = val;
break;
case this.BOOLEAN:
this._value.data = (val == 1);
break;
case this.DATETIME:
this._value.data = Date.UTC(val.slice(0, 4),
val.slice(4, 6) - 1, val.slice(6, 8), val.slice(9, 11),
val.slice(12, 14), val.slice(15));
break;
case this.BASE64:
this._value.data = base64ToString(val);
break;
default:
this._value.data = val;
}
},
_type: null,
get type() { return this._type; },
set type(type) {
this._type = type;
if (type == this.BASE64)
this._value = this._createType(this.STRING, {});
else this._value = this._createType(type, {});
},
appendValue: function(val) {
switch (this.type) {
case this.ARRAY:
this.value.AppendElement(val);
break;
case this.STRUCT:
this.value.setValue(this.name, val);
break;
}
}
};
/* The SimpleXMLParser class constructor
* This parser is specific to the XML-RPC format!
* It assumes tags without arguments, in lowercase.
*/
function SimpleXMLParser(instream, contentLength) {
this._stream = new PushbackInputStream(instream);
this._maxlength = contentLength;
}
/* The SimpleXMLParser class def */
SimpleXMLParser.prototype = {
_stream: null,
_docHandler: null,
_bufferSize: 256,
_parsed: 0,
_maxlength: 0,
_window: 0, // When async on big documents, release after windowsize.
setDocumentHandler: function(handler) { this._docHandler = handler; },
parse: function(windowsize) {
this._window += windowsize;
this._start();
},
// Guard maximum length
_read: function(length) {
length = Math.min(this._available(), length);
if (!length) return '';
var read = this._stream.read(length);
this._parsed += read.length;
return read;
},
_unread: function(data) {
this._stream.unread(data);
this._parsed -= data.length;
},
_available: function() {
return Math.min(this._stream.available(), this._maxAvailable());
},
_maxAvailable: function() { return this._maxlength - this._parsed; },
// read length characters from stream, block until we get them.
_blockingRead: function(length) {
length = Math.min(length, this._maxAvailable());
if (!length) return '';
var read = '';
while (read.length < length) read += this._read(length - read.length);
return read;
},
// read until the the 'findChar' character appears in the stream.
// We read no more than _bufferSize characters, and return what we have
// found so far, but no more than up to 'findChar' if found.
_readUntil: function(findChar) {
var read = this._blockingRead(this._bufferSize);
var pos = read.indexOf(findChar.charAt(0));
if (pos > -1) {
this._unread(read.slice(pos + 1));
return read.slice(0, pos + 1);
}
return read;
},
// Skip stream until string end is found.
_skipUntil: function(end) {
var read = '';
while (this._maxAvailable()) {
read += this._readUntil(end.charAt(0)) +
this._blockingRead(end.length - 1);
var pos = read.indexOf(end);
if (pos > -1) {
this._unread(read.slice(pos + end.length));
return;
}
read = read.slice(-(end.length)); // make sure don't miss our man.
}
return;
},
_buff: '',
// keep track of whitespce, so's we can discard it.
_killLeadingWS: false,
_trailingWS: '',
_start: function() {
// parse until exhausted. Note that we only look at a window
// of max. this._bufferSize. Also, parsing of comments, PI's and
// CDATA isn't as solid as it could be. *shrug*, XML-RPC responses
// are 99.99% of the time generated anyway.
// We don't check well-formedness either. Errors in tags will
// be caught at the doc handler.
ParseLoop: while (this._maxAvailable() || this._buff) {
// Check for window size. We stop parsing until more comes
// available (only in async parsing).
if (this._window < this._maxlength &&
this._parsed >= this._window)
return;
this._buff += this._read(this._bufferSize - this._buff.length);
this._buff = this._buff.replace('\r\n', '\n');
this._buff = this._buff.replace('\r', '\n');
var startTag = this._buff.indexOf('<');
if (startTag > -1) {
if (startTag > 0) { // We have character data.
var chars = this._buff.slice(0, startTag);
chars = chars.replace(/[ \t\n]*$/, '');
if (chars && this._killLeadingWS)
chars = chars.replace(/^[ \t\n]*/, '');
if (chars) {
// Any whitespace previously marked as trailing is in
// fact in the middle. Prepend.
chars = this._trailingWS + chars;
this._docHandler.characters(chars);
}
this._buff = this._buff.slice(startTag);
this._trailingWS = '';
this._killLeadingWS = false;
}
// Check for a PI
if (this._buff.charAt(1) == '?') {
var endTag = this._buff.indexOf('?>');
if (endTag > -1) this._buff = this._buff.slice(endTag + 2);
else {
// Make sure we don't miss '?' at the end of the buffer
this._unread(this._buff.slice(-1));
this._buff = '';
this._skipUntil('?>');
}
this._killLeadingWS = true;
continue;
}
// Check for a comment
if (this._buff.slice(0, 4) == '<!--') {
var endTag = this._buff.indexOf('-->');
if (endTag > -1) this._buff = this._buff.slice(endTag + 3);
else {
// Make sure we don't miss '--' at the end of the buffer
this._unread(this._buff.slice(-2));
this._buff = '';
this._skipUntil('-->');
}
this._killLeadingWS = true;
continue;
}
// Check for CDATA
// We only check the first four characters. Anything longer and
// we'd miss it and it would be recognized as a corrupt element
// Anything shorter will be missed by the element scanner as
// well. Next loop we'll have more characters to do a better
// match.
if (this._buff.slice(0, 4) == '<![C') {
// We need to be sure. If we have less than
// 9 characters in the buffer, we can't _be_ sure.
if (this._buff.length < 9 && this._maxAvailable()) continue;
if (this._buff.slice(0, 9) != '<![CDATA[')
throw Components.Exception('Error parsing response');
var endTag = this._buff.indexOf(']]>');
if (endTag > -1) {
this._buff = this._buff.slice(endTag + 3);
this._docHandler.characters(this._buff.slice(9,
endTag));
this._killLeadingWS = true;
continue;
}
// end not in stream. Hrmph
this._docHandler.characters(this._buff.slice(9));
this._buff = '';
while(this._maxAvailable()) {
this._buff += this._readUntil(']') +
this._blockingRead(2);
// Find end.
var pos = this._buff.indexOf(']]>');
// Found.
if (pos > -1) {
this._docHandler.characters(this._buff.slice(0,
pos));
this._buff = this._buff.slice(pos + 3);
this._killLeadingWS = true;
continue ParseLoop;
}
// Not yet found. Last 2 chars could be part of end.
this._docHandler.characters(this._buff.slice(0, -2));
this._buff = this._buff.slice(-2);
}
if (this._buff) // Uhoh. No ]]> found before EOF.
throw Components.Exception('Error parsing response');
continue;
}
// Check for a DOCTYPE decl.
if (this._buff.slice(0, 4) == '<!DO') {
if (this._buff.length < 9 && this.maxAvailable()) continue;
if (this._buff.slice(0, 9) != '<!DOCTYPE')
throw Components.Exception('Error parsing response');
// Look for markup decl.
var startBrace = this._buff.indexOf('[');
if (startBrace > -1) {
this._unread(this._buff.slice(startBrace + 1));
this._buff = '';
this._skipUntil(']');
this._skipUntil('>');
this._killLeadingWS = true;
continue;
}
var endTag = this._buff.indexOf('>');
if (endTag > -1) {
this._buff = this._buff.slice(endTag + 1);
this._killLeadingWS = true;
continue;
}
this._buff = '';
while(this._available()) {
this._buff = this._readUntil('>');
var startBrace = this._buff.indexOf('[');
if (startBrace > -1) {
this._unread(this._buff.slice(startBrace + 1));
this._buff = '';
this._skipUntil(']');
this._skipUntil('>');
this._killLeadingWS = true;
continue ParseLoop;
}
var endTag = this._buff.indexOf('>');
if (endTag > -1) {
this._buff = this._buff.slice(pos + 1);
this._killLeadingWS = true;
continue;
}
}
if (this._buff)
throw Components.Exception('Error parsing response');
continue;
}
var endTag = this._buff.indexOf('>');
if (endTag > -1) {
var tag = this._buff.slice(1, endTag);
this._buff = this._buff.slice(endTag + 1);
tag = tag.replace(/[ \t\n]+.*?(\/?)$/, '$1');
// XML-RPC tags are pretty simple.
if (/[^a-zA-Z0-9.\/]/.test(tag))
throw Components.Exception('Error parsing response');
// Determine start and/or end tag.
if (tag.charAt(tag.length - 1) == '/') {
this._docHandler.startElement(tag.slice(0, -1));
this._docHandler.endElement(tag.slice(0, -1));
} else if (tag.charAt(0) == '/') {
this._docHandler.endElement(tag.slice(1));
} else {
this._docHandler.startElement(tag);
}
this._killLeadingWS = true;
} else {
// No end tag. Check for window size to avoid an endless
// loop here.. hackish, I know, but if we get here this is
// not a XML-RPC request..
if (this._buff.length >= this._bufferSize)
throw Components.Exception('Error parsing response');
// If we get here and all what is to be read has
// been readinto the buffer, we have an incomplete stream.
if (!this._maxAvailable())
throw Components.Exception('Error parsing response');
}
} else {
if (this._killLeadingWS) {
this._buff = this._buff.replace(/^[ \t\n]*/, '');
if (this._buff) this._killLeadingWS = false;
} else {
// prepend supposed trailing whitespace to the front.
this._buff = this._trailingWS + this._buff;
this._trailingWS = '';
}
// store trailing whitespace, and only hand it over
// the next time round. Unless we hit a tag, then we kill it
if (this._buff) {
this._trailingWS = this._buff.match(/[ \t\n]*$/);
this._buff = this._buff.replace(/[ \t\n]*$/, '');
}
if (this._buff) this._docHandler.characters(this._buff);
this._buff = '';
}
}
}
};
/* The PushbackInputStream class constructor */
function PushbackInputStream(stream) {
this._stream = stream;
}
/* The PushbackInputStream class def */
PushbackInputStream.prototype = {
_stream: null,
_read_characters: '',
available: function() {
return this._read_characters.length + this._stream.available();
},
read: function(length) {
if (this._read_characters.length >= length) {
var read = this._read_characters.slice(0, length);
this._read_characters = this._read_characters.slice(length);
return read;
} else {
var read = this._read_characters;
this._read_characters = '';
return read + this._stream.read(length - read.length);
}
},
unread: function(chars) {
this._read_characters = chars + this._read_characters;
}
};
/*
* Objects
*/
/* nsXmlRpcClient Module (for XPCOM registration) */
var nsXmlRpcClientModule = {
registerSelf: function(compMgr, fileSpec, location, type) {
compMgr.registerComponentWithType(XMLRPCCLIENT_CID,
'XML-RPC Client JS component', XMLRPCCLIENT_CONTRACTID, fileSpec,
location, true, true, type);
compMgr.registerComponentWithType(XMLRPCFAULT_CID,
'XML-RPC Fault JS component', XMLRPCFAULT_CONTRACTID, fileSpec,
location, true, true, type);
},
getClassObject: function(compMgr, cid, iid) {
if (!cid.equals(XMLRPCCLIENT_CID) && !cid.equals(XMLRPCFAULT_CID))
throw Components.results.NS_ERROR_NO_INTERFACE;
if (!iid.equals(Components.interfaces.nsIFactory))
throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
if (cid.equals(XMLRPCCLIENT_CID))
return nsXmlRpcClientFactory
else return nsXmlRpcFaultFactory;
},
canUnload: function(compMgr) { return true; }
};
/* nsXmlRpcClient Class Factory */
var nsXmlRpcClientFactory = {
createInstance: function(outer, iid) {
if (outer != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
if (!iid.equals(XMLRPCCLIENT_IID) &&
!iid.equals(Components.interfaces.nsISupports))
throw Components.results.NS_ERROR_INVALID_ARG;
return new nsXmlRpcClient();
}
}
/* nsXmlRpcFault Class Factory */
var nsXmlRpcFaultFactory = {
createInstance: function(outer, iid) {
if (outer != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
if (!iid.equals(XMLRPCFAULT_IID) &&
!iid.equals(Components.interfaces.nsISupports))
throw Components.results.NS_ERROR_INVALID_ARG;
return new nsXmlRpcFault();
}
}
/*
* Functions
*/
/* module initialisation */
function NSGetModule(comMgr, fileSpec) { return nsXmlRpcClientModule; }
/* Create an instance of the given ContractID, with given interface */
function createInstance(contractId, intf) {
return Components.classes[contractId]
.createInstance(Components.interfaces[intf]);
}
/* Get a pointer to a service indicated by the ContractID, with given interface */
function getService(contractId, intf) {
return Components.classes[contractId].getService(Components.interfaces[intf]);
}
/* Convert an inputstream to a scriptable inputstream */
function toScriptableStream(input) {
var SIStream = Components.Constructor(
'@mozilla.org/scriptableinputstream;1',
'nsIScriptableInputStream', 'init');
return new SIStream(input);
}
/* format a Date object into a iso8601 datetime string, UTC time */
function iso8601Format(date) {
var datetime = date.getUTCFullYear();
var month = date.getUTCMonth() + 1;
datetime += (month < 10 ? '0' + month : month);
var day = date.getUTCDate();
datetime += (day < 10 ? '0' + day : day);
datetime += 'T';
var hour = date.getUTCHours();
datetime += (hour < 10 ? '0' + hour : hour) + ':';
var minutes = date.getUTCMinutes();
datetime += (minutes < 10 ? '0' + minutes : minutes) + ':';
var seconds = date.getUTCSeconds();
datetime += (seconds < 10 ? '0' + seconds : seconds);
return datetime;
}
/* Convert a stream to Base64, writing it away to a string writer */
const BASE64CHUNK = 255; // Has to be devidable by 3!!
function streamToBase64(stream, writer) {
while (stream.available()) {
var data = [];
while (data.length < BASE64CHUNK && stream.available()) {
var d = stream.read(1).charCodeAt(0);
// reading a 0 results in NaN, compensate.
data = data.concat(isNaN(d) ? 0 : d);
}
writer.write(toBase64(data));
}
}
/* Convert data (an array of integers) to a Base64 string. */
const toBase64Table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' +
'0123456789+/';
const base64Pad = '=';
function toBase64(data) {
var result = '';
var length = data.length;
// Convert every three bytes to 4 ascii characters.
for (var i = 0; i < (length - 2); i += 3) {
result += toBase64Table[data[i] >> 2];
result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
result += toBase64Table[((data[i+1] & 0x0f) << 2) + (data[i+2] >> 6)];
result += toBase64Table[data[i+2] & 0x3f];
}
// Convert the remaining 1 or 2 bytes, pad out to 4 characters.
if (length%3) {
var i = length - (length%3);
result += toBase64Table[data[i] >> 2];
if ((length%3) == 2) {
result += toBase64Table[((data[i] & 0x03) << 4) + (data[i+1] >> 4)];
result += toBase64Table[(data[i+1] & 0x0f) << 2];
result += base64Pad;
} else {
result += toBase64Table[(data[i] & 0x03) << 4];
result += base64Pad + base64Pad;
}
}
return result;
}
/* Convert Base64 data to a string */
const toBinaryTable = [
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
];
function base64ToString(data) {
var result = '';
var leftbits = 0; // number of bits decoded, but yet to be appended
var leftdata = 0; // bits decoded, bt yet to be appended
// Convert one by one.
for (var i in data) {
var c = toBinaryTable[data.charCodeAt(i) & 0x7f];
var padding = (data[i] == base64Pad);
// Skip illegal characters and whitespace
if (c == -1) continue;
// Collect data into leftdata, update bitcount
leftdata = (leftdata << 6) | c;
leftbits += 6;
// If we have 8 or more bits, append 8 bits to the result
if (leftbits >= 8) {
leftbits -= 8;
// Append if not padding.
if (!padding)
result += String.fromCharCode((leftdata >> leftbits) & 0xff);
leftdata &= (1 << leftbits) - 1;
}
}
// If there are any bits left, the base64 string was corrupted
if (leftbits)
throw Components.Exception('Corrupted base64 string');
return result;
}
if (DEBUG) debug = function(msg) {
dump(' -- XML-RPC client -- : ' + msg + '\n');
};
else debug = function() {}
// vim:sw=4:sr:sta:et:sts: