THRIFT-550: Added javascript support
git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@910158 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/js/thrift.js b/lib/js/thrift.js
new file mode 100644
index 0000000..b70986f
--- /dev/null
+++ b/lib/js/thrift.js
@@ -0,0 +1,671 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+var Thrift = {
+
+ Type : {
+ "STOP" : 0,
+ "VOID" : 1,
+ "BOOL" : 2,
+ "BYTE" : 3,
+ "I08" : 3,
+ "DOUBLE" : 4,
+ "I16" : 6,
+ "I32" : 8,
+ "I64" : 10,
+ "STRING" : 11,
+ "UTF7" : 11,
+ "STRUCT" : 12,
+ "MAP" : 13,
+ "SET" : 14,
+ "LIST" : 15,
+ "UTF8" : 16,
+ "UTF16" : 17
+ },
+
+ MessageType : {
+ "CALL" : 1,
+ "REPLY" : 2,
+ "EXCEPTION" : 3
+ }
+}
+
+Thrift.TException = {}
+Thrift.TException.prototype = {
+ initialize: function( message, code ) {
+ this.message = message;
+ this.code = (code == null) ? 0 : code;
+ }
+}
+
+
+Thrift.TApplicationException = {
+ "UNKNOWN" : 0,
+ "UNKNOWN_METHOD" : 1,
+ "INVALID_MESSAGE_TYPE" : 2,
+ "WRONG_METHOD_NAME" : 3,
+ "BAD_SEQUENCE_ID" : 4,
+ "MISSING_RESULT" : 5
+}
+
+Thrift.TApplicationException = function(message, code){
+ this.message = message
+ this.code = (code == null) ? 0 : code
+}
+
+Thrift.TApplicationException.prototype = {
+
+ read : function(input){
+
+ var ftype
+ var fid
+ var ret = input.readStructBegin(fname)
+
+ this.fname = ret.fname
+
+ while(1){
+
+ ret = input.readFieldBegin()
+
+ if(ret.ftype == TType.STOP)
+ break
+
+ var fid = ret.fid
+
+ switch(fid){
+ case 1:
+ if( ret.ftype == Type.STRING ){
+ ret = input.readString()
+ this.message = ret.value
+ } else {
+ ret = input.skip(ret.ftype)
+ }
+
+ break
+ case 2:
+ if( ret.ftype == Type.I32 ){
+ ret = input.readI32()
+ this.code = ret.value
+ } else {
+ ret = input.skip(ret.ftype)
+ }
+ break
+
+ default:
+ ret = input.skip(ret.ftype)
+ break
+ }
+
+ input.readFieldEnd()
+
+ }
+
+ input.readStructEnd()
+
+ },
+
+ write: function(output){
+ var xfer = 0;
+
+ output.writeStructBegin('TApplicationException');
+
+ if (this.message) {
+ output.writeFieldBegin('message', Type.STRING, 1)
+ output.writeString(this.getMessage())
+ output.writeFieldEnd()
+ }
+
+ if (this.code) {
+ output.writeFieldBegin('type', Type.I32, 2)
+ output.writeI32(this.code)
+ output.writeFieldEnd()
+ }
+
+ output.writeFieldStop()
+ output.writeStructEnd()
+
+ },
+
+ getCode : function() {
+ return this.code
+ },
+
+ getMessage : function() {
+ return this.message
+ }
+}
+
+
+
+/**
+ *If you do not specify a url then you must handle ajax on your own.
+ *This is how to use js bindings in a async fashion.
+ */
+Thrift.Transport = function(url){
+ this.url = url
+ this.wpos = 0
+ this.rpos = 0
+
+ this.send_buf = ''
+ this.recv_buf = ''
+}
+
+Thrift.Transport.prototype = {
+
+ //Gets the browser specific XmlHttpRequest Object
+ getXmlHttpRequestObject : function() {
+
+ try { return new XMLHttpRequest() } catch(e) {}
+ try { return new ActiveXObject("Msxml2.XMLHTTP") } catch (e) {}
+ try { return new ActiveXObject("Microsoft.XMLHTTP") } catch (e) {}
+
+ throw "Your browser doesn't support the XmlHttpRequest object. Try upgrading to Firefox."
+
+ },
+
+ flush : function(){
+
+ //async mode
+ if(this.url == undefined || this.url == '')
+ return this.send_buf;
+
+ var xreq = this.getXmlHttpRequestObject()
+
+ if (xreq.overrideMimeType)
+ xreq.overrideMimeType("application/json")
+
+ xreq.open("POST", this.url, false)
+ xreq.send(this.send_buf)
+
+ if (xreq.readyState != 4)
+ throw "encountered an unknown ajax ready state: "+xreq.readyState
+
+ if (xreq.status != 200)
+ throw "encountered a unknown request status: "+xreq.status
+
+ this.recv_buf = xreq.responseText
+ this.recv_buf_sz = this.recv_buf.length
+ this.wpos = this.recv_buf.length
+ this.rpos = 0
+ },
+
+ setRecvBuffer : function(buf){
+ this.recv_buf = buf
+ this.recv_buf_sz = this.recv_buf.length
+ this.wpos = this.recv_buf.length
+ this.rpos = 0
+ },
+
+ isOpen : function() {
+ return true
+ },
+
+ open : function() {},
+
+ close: function() {},
+
+ read : function(len) {
+ var avail = this.wpos - this.rpos
+
+ if(avail == 0)
+ return ''
+
+ var give = len
+
+ if(avail < len)
+ give = avail
+
+ var ret = this.read_buf.substr(this.rpos,give)
+ this.rpos += give
+
+ //clear buf when complete?
+ return ret
+ },
+
+ readAll : function() {
+ return this.recv_buf
+ },
+
+ write : function(buf){
+ this.send_buf = buf
+ },
+
+ getSendBuffer : function(){
+ return this.send_buf
+ }
+
+}
+
+
+
+Thrift.Protocol = function(transport){
+ this.transport = transport
+}
+
+Thrift.Protocol.Type = {}
+Thrift.Protocol.Type[ Thrift.Type.BOOL ] = '"tf"'
+Thrift.Protocol.Type[ Thrift.Type.BYTE ] = '"i8"'
+Thrift.Protocol.Type[ Thrift.Type.I16 ] = '"i16"'
+Thrift.Protocol.Type[ Thrift.Type.I32 ] = '"i32"'
+Thrift.Protocol.Type[ Thrift.Type.I64 ] = '"i64"'
+Thrift.Protocol.Type[ Thrift.Type.DOUBLE ] = '"dbl"'
+Thrift.Protocol.Type[ Thrift.Type.STRUCT ] = '"rec"'
+Thrift.Protocol.Type[ Thrift.Type.STRING ] = '"str"'
+Thrift.Protocol.Type[ Thrift.Type.MAP ] = '"map"'
+Thrift.Protocol.Type[ Thrift.Type.LIST ] = '"lst"'
+Thrift.Protocol.Type[ Thrift.Type.SET ] = '"set"'
+
+
+Thrift.Protocol.RType = {}
+Thrift.Protocol.RType[ "tf" ] = Thrift.Type.BOOL
+Thrift.Protocol.RType[ "i8" ] = Thrift.Type.BYTE
+Thrift.Protocol.RType[ "i16"] = Thrift.Type.I16
+Thrift.Protocol.RType[ "i32"] = Thrift.Type.I32
+Thrift.Protocol.RType[ "i64"] = Thrift.Type.I64
+Thrift.Protocol.RType[ "dbl"] = Thrift.Type.DOUBLE
+Thrift.Protocol.RType[ "rec"] = Thrift.Type.STRUCT
+Thrift.Protocol.RType[ "str"] = Thrift.Type.STRING
+Thrift.Protocol.RType[ "map"] = Thrift.Type.MAP
+Thrift.Protocol.RType[ "lst"] = Thrift.Type.LIST
+Thrift.Protocol.RType[ "set"] = Thrift.Type.SET
+
+Thrift.Protocol.Version = 1
+
+Thrift.Protocol.prototype = {
+
+ getTransport : function(){
+ return this.transport
+ },
+
+ //Write functions
+ writeMessageBegin : function(name,messageType,seqid){
+ this.tstack = new Array()
+ this.tpos = new Array();
+
+ this.tstack.push([Thrift.Protocol.Version,'"'+name+'"',messageType,seqid]);
+ },
+
+ writeMessageEnd : function(){
+ var obj = this.tstack.pop()
+
+ this.wobj = this.tstack.pop()
+ this.wobj.push(obj)
+
+ this.wbuf = "["+this.wobj.join(",")+"]";
+
+ this.transport.write(this.wbuf);
+ },
+
+
+ writeStructBegin : function(name){
+ this.tpos.push(this.tstack.length)
+ this.tstack.push({})
+ },
+
+ writeStructEnd : function(){
+
+ var p = this.tpos.pop()
+ var struct = this.tstack[p]
+ var str = "{"
+ var first = true
+ for( var key in struct ){
+ if(first)
+ first = false;
+ else
+ str += ",";
+
+ str += key+":"+struct[key]
+ }
+
+ str += "}"
+ this.tstack[p] = str;
+ },
+
+ writeFieldBegin : function(name,fieldType,fieldId){
+ this.tpos.push(this.tstack.length)
+ this.tstack.push({"fieldId" : '"'+fieldId+'"', "fieldType" : Thrift.Protocol.Type[fieldType]});
+
+ },
+
+ writeFieldEnd : function(){
+ var value = this.tstack.pop()
+ var fieldInfo = this.tstack.pop()
+
+ this.tstack[this.tstack.length-1][fieldInfo.fieldId] = "{"+fieldInfo.fieldType+":"+value+"}"
+ this.tpos.pop()
+ },
+
+ writeFieldStop : function(){
+ //na
+ },
+
+ writeMapBegin : function(keyType,valType,size){
+ //size is invalid, we'll set it on end.
+ this.tpos.push(this.tstack.length)
+ this.tstack.push([Thrift.Protocol.Type[keyType],Thrift.Protocol.Type[valType],0])
+ },
+
+ writeMapEnd : function(){
+ var p = this.tpos.pop()
+
+ if(p == this.tstack.length)
+ return;
+
+ if((this.tstack.length - p - 1) % 2 != 0)
+ this.tstack.push("");
+
+ var size = (this.tstack.length - p - 1)/2
+
+ this.tstack[p][this.tstack[p].length-1] = size;
+
+ var map = "{"
+ var first = true
+ while( this.tstack.length > p+1 ){
+ var v = this.tstack.pop()
+ var k = this.tstack.pop()
+ if(first){
+ first = false
+ }else{
+ map += ","
+ }
+
+ map += '"'+k+'":'+v
+ }
+ map += "}"
+
+ this.tstack[p].push(map)
+ this.tstack[p] = "["+this.tstack[p].join(",")+"]"
+ },
+
+ writeListBegin : function(elemType,size){
+ this.tpos.push(this.tstack.length)
+ this.tstack.push([Thrift.Protocol.Type[elemType],size]);
+ },
+
+ writeListEnd : function(){
+ var p = this.tpos.pop()
+
+ while( this.tstack.length > p+1 ){
+ this.tstack[p].push(this.tstack.pop())
+ }
+
+ this.tstack[p] = '['+this.tstack[p].join(",")+']';
+ },
+
+ writeSetBegin : function(elemType,size){
+ this.tpos.push(this.tstack.length)
+ this.tstack.push([Thrift.Protocol.Type[elemType],size]);
+ },
+
+ writeSetEnd : function(){
+ var p = this.tpos.pop()
+
+ while( this.tstack.length > p+1 ){
+ this.tstack[p].push(this.tstack.pop())
+ }
+
+ this.tstack[p] = '['+this.tstack[p].join(",")+']';
+ },
+
+ writeBool : function(value){
+ this.tstack.push( value ? 1 : 0 );
+ },
+
+ writeByte : function(i8){
+ this.tstack.push(i8);
+ },
+
+ writeI16 : function(i16){
+ this.tstack.push(i16);
+ },
+
+ writeI32 : function(i32){
+ this.tstack.push(i32);
+ },
+
+ writeI64 : function(i64){
+ this.tstack.push(i64);
+ },
+
+ writeDouble : function(dbl){
+ this.tstack.push(dbl);
+ },
+
+ writeString : function(str){
+ this.tstack.push('"'+encodeURIComponent(str)+'"');
+ },
+
+ writeBinary : function(str){
+ this.writeString(str);
+ },
+
+
+
+ // Reading functions
+ readMessageBegin : function(name, messageType, seqid){
+ this.rstack = new Array()
+ this.rpos = new Array()
+
+ this.robj = eval(this.transport.readAll())
+
+ var r = {}
+ var version = this.robj.shift()
+
+ if(version != Thrift.Protocol.Version){
+ throw "Wrong thrift protocol version: "+version
+ }
+
+ r["fname"] = this.robj.shift()
+ r["mtype"] = this.robj.shift()
+ r["rseqid"] = this.robj.shift()
+
+
+ //get to the main obj
+ this.rstack.push(this.robj.shift())
+
+ return r
+ },
+
+
+ readMessageEnd : function(){
+ },
+
+ readStructBegin : function(name){
+ var r = {};
+ r["fname"] = '';
+
+ return r;
+ },
+
+ readStructEnd : function(){
+ },
+
+ readFieldBegin : function(){
+ var r = {};
+
+ var fid = -1
+ var ftype = Thrift.Type.STOP
+
+ //get a fieldId
+ for(var f in (this.rstack[this.rstack.length-1])){
+ if(f == null) continue
+
+ fid = parseInt(f)
+ this.rpos.push(this.rstack.length)
+
+ var field = this.rstack[this.rstack.length-1][fid]
+
+ //remove so we don't see it again
+ delete this.rstack[this.rstack.length-1][fid]
+
+ this.rstack.push(field)
+
+ break
+ }
+
+ if(fid != -1){
+
+ //should only be 1 of these but this is the only
+ //way to match a key
+ for(var f in (this.rstack[this.rstack.length-1])){
+ if(Thrift.Protocol.RType[f] == null ) continue
+
+ ftype = Thrift.Protocol.RType[f]
+ this.rstack[this.rstack.length-1] = this.rstack[this.rstack.length-1][f]
+ }
+ }
+
+ r["fname"] = ''
+ r["ftype"] = ftype
+ r["fid"] = fid
+
+
+ return r
+ },
+
+ readFieldEnd : function(){
+ var pos = this.rpos.pop()
+
+ //get back to the right place in the stack
+ while(this.rstack.length > pos)
+ this.rstack.pop();
+
+ },
+
+ readMapBegin : function(keyType,valType,size){
+
+ var map = this.rstack[this.rstack.length-1]
+
+ var r = {};
+ r["ktype"] = Thrift.Protocol.RType[map.shift()]
+ r["vtype"] = Thrift.Protocol.RType[map.shift()]
+ r["size"] = map.shift()
+
+
+ this.rpos.push(this.rstack.length)
+ this.rstack.push(map.shift())
+
+ return r;
+ },
+
+ readMapEnd : function(){
+ this.readFieldEnd()
+ },
+
+ readListBegin : function(elemType,size){
+
+ var list = this.rstack[this.rstack.length-1]
+
+ var r = {};
+ r["etype"] = Thrift.Protocol.RType[list.shift()];
+ r["size" ] = list.shift();
+
+
+ this.rpos.push(this.rstack.length);
+ this.rstack.push(list.shift())
+
+
+ return r;
+ },
+
+ readListEnd : function(){
+ this.readFieldEnd()
+ },
+
+ readSetBegin : function(elemType,size){
+ return this.readListBegin(elemType,size)
+ },
+
+ readSetEnd : function(){
+ return this.readListEnd()
+ },
+
+ readBool : function(){
+ var r = this.readI32()
+
+ if( r != null && r["value"] == "1" ){
+ r["value"] = true
+ }else{
+ r["value"] = false
+ }
+
+ return r
+ },
+
+ readByte : function(){
+ return this.readI32()
+ },
+
+ readI16 : function(){
+ return this.readI32()
+ },
+
+
+ readI32 : function(){
+ var f = this.rstack[this.rstack.length-1]
+ var r = {}
+
+ if(f instanceof Array){
+ r["value"] = f.pop()
+
+ }else if(f instanceof Object){
+ for(var i in f){
+ if(i == null) continue
+ this.rstack.push(f[i])
+ delete f[i]
+
+ r["value"] = i
+ break
+ }
+ } else {
+ r["value"] = f
+ }
+
+
+ return r
+ },
+
+ readI64 : function(){
+ return this.readI32()
+ },
+
+ readDouble : function(){
+ return this.readI32()
+ },
+
+ readString : function(){
+ var r = this.readI32()
+ r["value"] = decodeURIComponent(r["value"])
+
+ return r
+ },
+
+ readBinary : function(){
+ return this.readString()
+ },
+
+
+ //Method to arbitrarily skip over data.
+ skip : function(type){
+ throw "skip not supported yet"
+ }
+
+}
+
+
+