大家好，又见面了，我是全栈君。
首先要搭建一个httpserver，这里採用tomcat6为例：
过程：新建一个Servlet，并使用tomcat的默认port号8080监听，最后写一个jsp来測试能否够訪问该server
1）新建一个Serlvet
新建完后增加写下測试代码：
代码语言：javascript复制public class TestServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* Default constructor.
*/
public TestServlet() {
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setAttribute("test", "test");
request.getRequestDispatcher("index.jsp").forward(request, response);
}
}该Servlet的名字是TestServlet。所以把web.xml中的内容改成下面内容
代码语言：javascript复制<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>TestServlet</display-name> <servlet> <servlet-name>TestServlet</servlet-name> <servlet-class>com.test.servlet.TestServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>TestServlet</servlet-name> <url-pattern>/TestServlet</url-pattern> </servlet-mapping></web-app>然后编写一个訪问该Servlet后会跳转的jsp（index.jsp）
代码语言：javascript复制<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
${test }
</body>
</html>最后启动server。在浏览器中如输入下面地址：http://localhost:8080/TestServlet/TestServlet，能够看到訪问成功
其次在cocos2d-x项目中封装curl（參考Cocos2d-x高级开发教程，并添加了能够传输多个键值对），代码比較简单，直接在凝视中说明：
头文件：
代码语言：javascript复制//单线程发送，会堵塞
class NetworkAdaptor {
public:
NetworkAdaptor(const string &baseUrl);//构造
NetworkAdaptor(const char* baseUrl);//构造
bool sendValueForKey(const char* key, const char* value, string &wirteBackBuffer);//发送一个HTTP请求
bool sendValueForKey(const map<string, string> &content, string &wirteBackBuffer);//发送一个HTTP请求
private:
string m_sBaseUrl;//请求的url地址
};
//多线程线程发送
class AsynNetworkAdaptor {
public:
void sendValueForKeyToUrl(const char* key, const char* value, const string &url, string &wirteBackBuffer);//添加一个HTTP请求
void sendValueForKeyToUrl(const map<string, string> content, const string &url, string &wirteBackBuffer);//添加一个HTTP请求
void flushSendRequests();//批量发送HTTP请求
CC_SYNTHESIZE_READONLY(int, m_iUnfinishedRequest, UnfinishedRequest);//发送的数量
protected:
struct RequestInfo {//请求信息
RequestInfo(const map<string, string> &content, const string &url, string &buffer) : content(content), url(url), buffer(buffer){}
map<string, string> content;//发送内容
string url;//请求的url地址
string &buffer;//server回传的内容
};
vector<RequestInfo> requests;//请求容器
};cpp文件：
代码语言：javascript复制//将键值对的内容转换成表单格式的内容进行传送
void translate(const map<string, string> &content, string &sendout) {
sendout = "";
for(map<string, string>::const_iterator it = content.begin(); it != content.end(); it) {
sendout = sendout (it->first "=" it->second) "&";
}
sendout = sendout.substr(0, sendout.length() - 1);//去掉最后一个&字符
}
//回调函数。一定要返回服务器对应过来的字节大小
size_t writer(char* data, size_t size, size_t number, string* writeData) {
if(writeData == NULL) {
return 0;
}
writeData->append(data, size * number);
return size * number;
}
NetworkAdaptor::NetworkAdaptor(const string& baseUrl) {
this->m_sBaseUrl = baseUrl;
}
NetworkAdaptor::NetworkAdaptor(const char* baseUrl) {
this->m_sBaseUrl = string(baseUrl);
}
bool NetworkAdaptor::sendValueForKey(const char* key, const char* value, string &wirteBackBuffer) {
map<string, string> content;
content.insert(make_pair(key, value));
sendValueForKey(content, wirteBackBuffer);
return true;
}
bool NetworkAdaptor::sendValueForKey(const map<string, string> &content, string &wirteBackBuffer) {
CURL* curl = curl_easy_init();//初始化curl
if(curl) {
string sendout;
translate(content, sendout);
//配置curl的请求參数
curl_easy_setopt(curl, CURLOPT_URL, m_sBaseUrl.c_str());
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(curl, CURLOPT_POST, 1);//post方式
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, sendout.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &wirteBackBuffer);
int res = curl_easy_perform(curl);
curl_easy_cleanup(curl);
if(res == CURLE_OK) {
CCLog("get data from server : %s", wirteBackBuffer.c_str());
return true;
}else {
CCLog("curl post error");
}
}else {
CCLog("curl init fail");
}
return false;
}
void AsynNetworkAdaptor::sendValueForKeyToUrl(const char* key, const char* value, const string &url, string &wirteBackBuffer) {
map<string, string> content;
content.insert(make_pair(key, value));
sendValueForKeyToUrl(content, url, wirteBackBuffer);
}
void AsynNetworkAdaptor::sendValueForKeyToUrl(const map<string, string> content, const string &url, string &wirteBackBuffer) {
RequestInfo info(content, url, wirteBackBuffer);
requests.push_back(info);//将请求放到请求容器中
}
void AsynNetworkAdaptor::flushSendRequests() {
CURLM* curlm = curl_multi_init();
if(curlm) {
for(unsigned int i = 0; i < requests.size(); i) {//将请求容器中的请求批量发送到服务端
CURL* curl = curl_easy_init();
if(curl) {
string sendout;
translate(requests[i].content, sendout);
curl_easy_setopt(curl, CURLOPT_URL, requests[i].url.c_str());
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(curl, CURLOPT_POST, 1);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, sendout.c_str());
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writer);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, &requests[i].buffer);
int res = curl_easy_perform(curl);
curl_multi_add_handle(curlm, curl);
curl_easy_cleanup(curl);
}else {
CCLog("curl init fail");
break;
}
}
CURLMcode curlm_code = CURLM_CALL_MULTI_PERFORM;
while(CURLM_CALL_MULTI_PERFORM == curlm_code) {
curlm_code = curl_multi_perform(curlm, &m_iUnfinishedRequest);
}
if (curlm_code != CURLM_OK) {
CCLog("curlm post error");
}
curl_multi_cleanup(curlm);
}else {
CCLog("curlm init fail");
}
}最后写一个測试用例：
代码语言：javascript复制 NetworkAdaptor n("http://localhost:8080/TestServlet/TestServlet");
string v;
map<string, string> m;
m.insert(make_pair("name", "myName"));
m.insert(make_pair("password", "myPassword"));
n.sendValueForKey(m, v);
CCLog("%s", v.c_str());改动server端的代码。使其不跳转。并给client响应一句话
代码语言：javascript复制 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//request.setAttribute("testt", "test");
//request.getRequestDispatcher("index.jsp").forward(request, response);
String name = request.getParameter("name");
String password = request.getParameter("password");
System.out.println("name: " name " , password: " password);//输出从client发送过来的内容
response.getWriter().print("server have get data");//给client响应一句话
}如在控制台看到下面測试结果。则表明訪问成功：
服务端：
client：
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