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75 lines
3.0 KiB
JavaScript
75 lines
3.0 KiB
JavaScript
15 years ago
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dojo.provide("dojox.io.httpParse");
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dojox.io.httpParse = function(/*String*/httpStream, /*String?*/topHeaders,/*Boolean?*/ partial){
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// summary:
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// Parses an HTTP stream for a message.
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// httpStream:
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// HTTP stream to parse
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// topHeaders:
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// Extra header information to add to each HTTP request (kind of HTTP inheritance)
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// partial:
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// A true value indicates that the stream may not be finished, it may end arbitrarily in mid stream.
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// The last XHR object will have a special property _lastIndex that indicates the how far along
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// the httpStream could be successfully parsed into HTTP messages.
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// return:
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// Returns an array of XHR-like object for reading the headers for each message
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//
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var xhrs=[];
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var streamLength = httpStream.length;
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do{
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var headers = {};
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var httpParts = httpStream.match(/(\n*[^\n]+)/);
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if(!httpParts){
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return null;
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}
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httpStream = httpStream.substring(httpParts[0].length+1);
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httpParts = httpParts[1];
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var headerParts = httpStream.match(/([^\n]+\n)*/)[0];
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httpStream = httpStream.substring(headerParts.length);
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var headerFollowingChar = httpStream.substring(0,1);
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httpStream = httpStream.substring(1);
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headerParts = (topHeaders || "") + headerParts;
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var headerStr = headerParts;
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headerParts = headerParts.match(/[^:\n]+:[^\n]+\n/g); // parse the containing and contained response headers with the contained taking precedence (by going last)
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for(var j = 0; j < headerParts.length; j++){
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var colonIndex = headerParts[j].indexOf(':');
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headers[headerParts[j].substring(0,colonIndex)] = headerParts[j].substring(colonIndex+1).replace(/(^[ \r\n]*)|([ \r\n]*)$/g,''); // trim
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}
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httpParts = httpParts.split(' ');
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var xhr = { // make it look like an xhr object, at least for the response part of the API
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status : parseInt(httpParts[1],10),
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statusText : httpParts[2],
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readyState : 3, // leave it at 3 until we get a full body
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getAllResponseHeaders : function(){
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return headerStr;
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},
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getResponseHeader : function(name){
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return headers[name];
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}
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};
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var contentLength = headers['Content-Length'];
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var content;
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if(contentLength){
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if(contentLength <= httpStream.length){
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content = httpStream.substring(0,contentLength);
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}else{
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return xhrs; // the content is not finished
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}
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}else if((content = httpStream.match(/(.*)HTTP\/\d\.\d \d\d\d[\w\s]*\n/))){ // assign content
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// if we spot another HTTP message coming up, we will just assign all the in between text to the content
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content = content[0];
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}else if(!partial || headerFollowingChar == '\n'){
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// if we have to finish
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content = httpStream;
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}else{
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return xhrs;
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}
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xhrs.push(xhr); // add it to the list, since it is a full HTTP message
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httpStream = httpStream.substring(content.length); // move along the stream
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xhr.responseText = content;
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xhr.readyState = 4;
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xhr._lastIndex = streamLength - httpStream.length; // need to pick up from where we left on streaming connections
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}while(httpStream);
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return xhrs;
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}
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