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fillano/fwajax3.js

Created April 25, 2012 01:41
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Revisions

  1. fillano created this gist Apr 25, 2012.
    89 changes: 89 additions & 0 deletions fwajax3.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,89 @@
    function FwAjax3(host, cb) {
    var req = function() {
    try{ return new XMLHttpRequest();} catch(e){}
    try{ return new ActiveXObject("Msxml2.XMLHTTP.6.0") }catch(e){}
    try{ return new ActiveXObject("Msxml2.XMLHTTP.3.0") }catch(e){}
    try{ return new ActiveXObject("Msxml2.XMLHTTP") }catch(e){}
    try{ return new ActiveXObject("Microsoft.XMLHTTP") }catch(e){}
    return null;
    }(),
    boundary = function () {
    var tmp = Math.random();
    var thisDate = new Date();
    tmp = Math.abs(tmp*thisDate.getTime());
    tmp = "--------" + tmp + "--------";
    return tmp;
    }(),
    createFile = function (_field, _value, _encoding) {
    var tmp = "--" + boundary + CRLF;
    tmp += "Content-Disposition: attachment; name=\"" + _field + "\"; filename=\"" + _value.name + "\"" + CRLF;
    tmp += "Content-Type: " + _value.type + CRLF;
    tmp += "Content-Transfer-Encoding: " + _encoding + CRLF + CRLF;
    tmp += _value.data + CRLF;
    // tmp += "--" + boundary + "--" + CRLF + CRLF;
    return tmp;
    },
    createField = function (_field, _value) {
    var tmp = "--" + boundary + CRLF;
    tmp += "Content-Disposition: form-data; name=\"" + _field + "\"" + CRLF;
    tmp += "Content-Transfer-Encoding: chucked" + CRLF + CRLF;
    tmp += _value + CRLF;
    // tmp += "--" + boundary + "--" + CRLF + CRLF;
    return tmp;
    },
    fields = [],
    files = [],
    CRLF = "\r\n";
    req.onreadystatechange = function() {
    if(window.console) console.log(req.readyState);
    if(req.readyState == 4) {
    if(window.console) console.log(req.status);
    if(req.status == 200) {
    cb(req.responseText, req.responseXML);
    }
    }
    };
    this.addFile = function(_field, _value, _encoding) {
    files.push([_field, _value, _encoding]);
    };
    this.removeFile = function(_field) {
    for (var i=0; i<files.length; i++) {
    if (files[i][0] == _field) {
    files.splice(i,1);
    }
    }
    };
    this.clearFile = function() {
    files = [];
    };
    this.addField = function(_field, _value) {
    fields.push([_field, _value]);
    };
    this.removeField = function(_field) {
    for (var i=0; i<fields.length; i++) {
    if (fields[i][0] == _field) {
    fields.splice(i,1);
    }
    }
    };
    this.clearField = function () {
    fields = [];
    };
    this.send = function() {
    req.open("POST", host, true);
    var msgBody = "";
    for (var i=0; i<fields.length; i++){
    msgBody += createField(fields[i][0], fields[i][1]);
    }
    for (var i=0; i<files.length; i++){
    msgBody += createFile(files[i][0], files[i][1], files[i][2]);
    }
    msgBody += "--" + boundary + "--" + CRLF + CRLF;
    req.setRequestHeader("Content-Type","multipart/form-data; boundary="+boundary);
    // req.setRequestHeader("Transfer-Encoding", "base64");
    // req.setRequestHeader("Connection","Keep-Alive");
    // req.setRequestHeader("Content-Length",msgBody.length);
    // if(window.console) console.log('content-length: ' + msgBody.length);
    req.send(msgBody);
    };
    }