get:提交请求
post:上传文件
var http = {
// calback(err, data)
// url 站点: http://www.baidu.com
// path 子路径 /index.htm
// params: key1=value1&key2=value2&key3=value3
// callback: 当这个请求有回应的时候调用这个callback函数;
// (err, ret) 如果有错误err != null, 如果没有错误error == null
get: function(url, path, params, callback) {
var xhr = cc.loader.getXMLHttpRequest();
xhr.timeout = 5000;
var requestURL = url + path;
if (params) {
requestURL = requestURL + "?" + params;
}
xhr.open("GET",requestURL, true);
if (cc.sys.isNative){
xhr.setRequestHeader("Accept-Encoding","gzip,deflate","text/html;charset=UTF-8");
}
xhr.onreadystatechange = function() {
if(xhr.readyState === 4 && (xhr.status >= 200 && xhr.status < 300)){
console.log("http res("+ xhr.responseText.length + "):" + xhr.responseText);
try {
// var ret = JSON.parse(xhr.responseText);
var ret = xhr.responseText;
if(callback !== null){
callback(null, ret);
} /* code */
} catch (e) {
console.log("err:" + e);
callback(e, null);
}
finally{
if(cc.vv && cc.vv.wc){
// cc.vv.wc.hide();
}
}
}
};
if(cc.vv && cc.vv.wc){
//cc.vv.wc.show();
}
xhr.send();
return xhr;
},
// post和get区别是post能带数据body,其他的和get一样
post: function(url, path, params, body, callback) {
var xhr = cc.loader.getXMLHttpRequest();
xhr.timeout = 5000;
var requestURL = url + path;
if (params) {
requestURL = requestURL + "?" + params;
}
xhr.open("POST",requestURL, true);
if (cc.sys.isNative){
xhr.setRequestHeader("Accept-Encoding","gzip,deflate","text/html;charset=UTF-8");
}
if (body) {
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
// xhr.setRequestHeader("Content-Length", body.length);
}
xhr.onreadystatechange = function() {
if(xhr.readyState === 4 && (xhr.status >= 200 && xhr.status < 300)){
console.log("http res("+ xhr.responseText.length + "):" + xhr.responseText);
try {
// var ret = JSON.parse(xhr.responseText);
var ret = xhr.responseText;
if(callback !== null){
callback(null, ret);
} /* code */
} catch (e) {
console.log("err:" + e);
callback(e, null);
}
finally{
if(cc.vv && cc.vv.wc){
// cc.vv.wc.hide();
}
}
}
};
if(cc.vv && cc.vv.wc){
//cc.vv.wc.show();
}
if (body) {
xhr.send(body);
}
return xhr;
},
// 下载他是基于get操作，参数也一样，为什么不用get那个函数呢？
download: function(url, path, params, callback) {
var xhr = cc.loader.getXMLHttpRequest();
xhr.timeout = 5000;
var requestURL = url + path;
if (params) {
requestURL = requestURL + "?" + params;
}
xhr.responseType = "arraybuffer"; // 指定我们的数据类型
xhr.open("GET",requestURL, true);
if (cc.sys.isNative){
xhr.setRequestHeader("Accept-Encoding","gzip,deflate","text/html;charset=UTF-8");
}
xhr.onreadystatechange = function() {
if(xhr.readyState === 4 && (xhr.status >= 200 && xhr.status < 300)){
var buffer = xhr.response;
var data = new Uint8Array(buffer); // arraybuffer, new Unit8Array
callback(null, data);
}
};
if(cc.vv && cc.vv.wc){
//cc.vv.wc.show();
}
xhr.send();
return xhr;
},
};
module.exports = http;