javaScript Ajax stream 流式显示

流式实现

1. function ajax_stream(url,data,element){
2. var xmlHttp=null;
3. if(window.xmlhttpRequest)
4. {// code for IE7, Firefox, Opera, etc.
5. xmlHttp=newXMLHttPRequest();
6. }
7. elseif(window.ActiveXObject)
8. {// code for IE6, IE5
9. xmlHttp=newActiveXObject("Microsoft.XMLHTTP");
10. }
11. if(xmlHttp==null)
12. {
13. alert("Your browser does not support XMLHTTP.");
14. element.val('Your browser does not support XMLHTTP. Click the LOG link to monitor the procedure.');
15. return0;
16. }
17. var xhr=xmlHttp;
18. xhr.open('POST',url,true);
19. // 如果需要像 HTML 表单那样 POST 数据，请使用 setRequestHeader() 来添加 HTTP 头。然后在 send() 方法中规定您希望发送的数据：
20. xhr.setRequestHeader("Content-type","application/x-www-form-urlencoded");
21. xhr.send(data);
22. vartimer;
23. timer=window.setInterval(function(){
24. if(xhr.readyState==XMLHttpRequest.DONE){
25. window.clearTimeout(timer);
26. }
27. element.val(xhr.responseText);
28. },1000);
29. }

post数据转换

1. voidsend();
2. voidsend(ArrayBuffer data);
3. voidsend(Blobdata);
4. voidsend(Documentdata);
5. voidsend(DOMString?data);
6. voidsend(FormData data);

1. function ajax_generate_data(jsobj){
2. var i;
3. if(window.FormData){
4. var data=newFormData();
5. foriinjsobj{
6. data.append(i,jsobj[i]);
7. }
8. }else{
9. var data='';
10. var datas=[];
11. foriinjsobj{
12. // for the values so that possible & contained in the strings do not break the format
13. varvalue=encodeURIComponent(jsobj[i]);
14. datas.append(i+'='+value);
15. }
16. data=datas.join('&')
17. }
18. console.log(data);
19. returndata;
20. }