feat: add cpp example for http

Main/ghttp.cpp

@@ -31,9 +31,20 @@ int connection_num = 0;
 //2. index.html: only query (maybe load/unload if using multiple databases)
 //3. ghttp: can add or not add a db as parameter
 //BETTER: How about change HttpConnector into a console?
+//
 //TODO: we need a route
 //JSON parser: http://www.tuicool.com/articles/yUJb6f     
 //(or use boost spirit to generate parser when compiling)
+//
+//NOTICE: no need to close connection here due to the usage of shared_ptr
+//http://www.tuicool.com/articles/3Ub2y2
+//
+//TODO: the URL format is terrible, i.e. 127.0.0.1:8080/build/lubm/data/LUBM_10.n3
+//we should define some keys like operation, database, dataset, query, path ...
+//127.0.0.1:8080?operation=build&database=lubm&dataset=data/LUBM_10.n3
+//
+//TODO: control the authority, check it if requesting for build/load/unload
+//for sparql endpoint, just load database when starting, and comment out all functions except for query()
 
 int main() {
     Util util;
@@ -50,6 +61,7 @@ int main() {
     //server.resource["^/build/([a-zA-Z]+[0-9]*)/([a-zA-Z]+/*[a-zA-Z]+[0-9]*.n[a-zA-Z]*[0-9]*)$"]["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
     // server.resource["^/build/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)$"]["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
     server.resource["^/build/([a-zA-Z0-9]*)/(.*)$"]["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
+		cout<<"HTTP: this is build"<<endl;
         string db_name=request->path_match[1];
         string db_path=request->path_match[2];
         if(db_name=="" || db_path=="")
@@ -104,6 +116,7 @@ int main() {
     //GET-example for the path /load/[db_name], responds with the matched string in path
     //For instance a request GET /load/db123 will receive: db123
     server.resource["^/load/(.*)$"]["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
+		cout<<"HTTP: this is load"<<endl;
         string db_name=request->path_match[1];
 	
 	
@@ -154,6 +167,7 @@ int main() {
     //GET-example for the path /query/[query_file_path], responds with the matched string in path
     //For instance a request GET /query/db123 will receive: db123
     server.resource["^/query/(.*)$"]["GET"] = [&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
+		cout<<"HTTP: this is query"<<endl;
         string db_query=request->path_match[1];
         string str = db_query;
 
@@ -213,6 +227,7 @@ int main() {
     //GET-example for the path /unload/[db_name], responds with the matched string in path
     //For instance a request GET /unload/db123 will receive: db123
     server.resource["^/unload$"]["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
+		cout<<"HTTP: this is unload"<<endl;
         if(current_database == NULL)
         {
             string error = "No database used now.";
@@ -228,6 +243,7 @@ int main() {
     };
 
     server.resource["^/monitor$"]["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
+		cout<<"HTTP: this is monitor"<<endl;
         if(current_database == NULL)
         {
             string error = "No database used now.";
@@ -284,6 +300,7 @@ int main() {
     //Can for instance be used to retrieve an HTML 5 client that uses REST-resources on this server
     server.default_resource["GET"]=[&server](shared_ptr<HttpServer::Response> response, shared_ptr<HttpServer::Request> request) {
 		//BETTER: use lock to ensure thread safe
+		cout<<"HTTP: this is default"<<endl;
 		connection_num++;
 		//NOTICE: it seems a visit will output twice times
 		//And different pages in a browser is viewed as two connections here

api/http/cpp/Makefile

@@ -0,0 +1,5 @@
+example: example.cpp client.cpp client.h
+	g++ -o example example.cpp client.cpp -lcurl
+
+clean:
+	rm *.o example

api/http/cpp/client.cpp

@@ -0,0 +1,194 @@
+#include "client.h"
+#include <curl/curl.h>
+#include <string>
+
+CHttpClient::CHttpClient(void) : 
+m_bDebug(false)
+{
+
+}
+
+CHttpClient::~CHttpClient(void)
+{
+
+}
+
+static int OnDebug(CURL *, curl_infotype itype, char * pData, size_t size, void *)
+{
+	if(itype == CURLINFO_TEXT)
+	{
+		//printf("[TEXT]%s\n", pData);
+	}
+	else if(itype == CURLINFO_HEADER_IN)
+	{
+		printf("[HEADER_IN]%s\n", pData);
+	}
+	else if(itype == CURLINFO_HEADER_OUT)
+	{
+		printf("[HEADER_OUT]%s\n", pData);
+	}
+	else if(itype == CURLINFO_DATA_IN)
+	{
+		printf("[DATA_IN]%s\n", pData);
+	}
+	else if(itype == CURLINFO_DATA_OUT)
+	{
+		printf("[DATA_OUT]%s\n", pData);
+	}
+	return 0;
+}
+
+static size_t OnWriteData(void* buffer, size_t size, size_t nmemb, void* lpVoid)
+{
+	std::string* str = dynamic_cast<std::string*>((std::string *)lpVoid);
+	if( NULL == str || NULL == buffer )
+	{
+		return -1;
+	}
+
+    char* pData = (char*)buffer;
+    str->append(pData, size * nmemb);
+	return nmemb;
+}
+
+int CHttpClient::Post(const std::string & strUrl, const std::string & strPost, std::string & strResponse)
+{
+	strResponse.clear();
+	CURLcode res;
+	CURL* curl = curl_easy_init();
+	if(NULL == curl)
+	{
+		return CURLE_FAILED_INIT;
+	}
+	if(m_bDebug)
+	{
+		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+		curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
+	}
+	curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
+	curl_easy_setopt(curl, CURLOPT_POST, 1);
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, strPost.c_str());
+	curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
+	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
+	res = curl_easy_perform(curl);
+	curl_easy_cleanup(curl);
+	return res;
+}
+
+int CHttpClient::Get(const std::string & strUrl, std::string & strResponse)
+{
+	strResponse.clear();
+	CURLcode res;
+	CURL* curl = curl_easy_init();
+	if(NULL == curl)
+	{
+		return CURLE_FAILED_INIT;
+	}
+	if(m_bDebug)
+	{
+		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+		curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
+	}
+	curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
+	curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
+	/**
+	* 当多个线程都使用超时处理的时候，同时主线程中有sleep或是wait等操作。
+	* 如果不设置这个选项，libcurl将会发信号打断这个wait从而导致程序退出。
+	*/
+	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
+	res = curl_easy_perform(curl);
+	curl_easy_cleanup(curl);
+	return res;
+}
+
+int CHttpClient::Posts(const std::string & strUrl, const std::string & strPost, std::string & strResponse, const char * pCaPath)
+{
+	strResponse.clear();
+	CURLcode res;
+	CURL* curl = curl_easy_init();
+	if(NULL == curl)
+	{
+		return CURLE_FAILED_INIT;
+	}
+	if(m_bDebug)
+	{
+		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+		curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
+	}
+	curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
+	curl_easy_setopt(curl, CURLOPT_POST, 1);
+	curl_easy_setopt(curl, CURLOPT_POSTFIELDS, strPost.c_str());
+	curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
+	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+	if(NULL == pCaPath)
+	{
+		curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
+		curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);
+	}
+	else
+	{
+		//缺省情况就是PEM，所以无需设置，另外支持DER
+		//curl_easy_setopt(curl,CURLOPT_SSLCERTTYPE,"PEM");
+		curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, true);
+		curl_easy_setopt(curl, CURLOPT_CAINFO, pCaPath);
+	}
+	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
+	res = curl_easy_perform(curl);
+	curl_easy_cleanup(curl);
+	return res;
+}
+
+int CHttpClient::Gets(const std::string & strUrl, std::string & strResponse, const char * pCaPath)
+{
+	strResponse.clear();
+	CURLcode res;
+	CURL* curl = curl_easy_init();
+	if(NULL == curl)
+	{
+		return CURLE_FAILED_INIT;
+	}
+	if(m_bDebug)
+	{
+		curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+		curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, OnDebug);
+	}
+	curl_easy_setopt(curl, CURLOPT_URL, strUrl.c_str());
+	curl_easy_setopt(curl, CURLOPT_READFUNCTION, NULL);
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, OnWriteData);
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&strResponse);
+	curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
+	if(NULL == pCaPath)
+	{
+		curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, false);
+		curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, false);
+	}
+	else
+	{
+		curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, true);
+		curl_easy_setopt(curl, CURLOPT_CAINFO, pCaPath);
+	}
+	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, 3);
+	curl_easy_setopt(curl, CURLOPT_TIMEOUT, 3);
+	res = curl_easy_perform(curl);
+	curl_easy_cleanup(curl);
+	return res;
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////
+
+void CHttpClient::SetDebug(bool bDebug)
+{
+	m_bDebug = bDebug;
+}
+

api/http/cpp/client.h

@@ -0,0 +1,62 @@
+#ifndef __HTTP_CURL_H__
+#define __HTTP_CURL_H__
+
+//REFERENCE: https://curl.haxx.se/
+//
+//TODO: deal with cookie
+//URL encode: http://www.ruanyifeng.com/blog/2010/02/url_encoding.html
+
+#include <string>
+
+class CHttpClient
+{
+public:
+	CHttpClient(void);
+	~CHttpClient(void);
+
+public:
+	/**
+	* @brief HTTP POST请求
+	* @param strUrl 输入参数,请求的Url地址,如:http://www.baidu.com
+	* @param strPost 输入参数,使用如下格式para1=val1¶2=val2&…
+	* @param strResponse 输出参数,返回的内容
+	* @return 返回是否Post成功
+	*/
+	int Post(const std::string & strUrl, const std::string & strPost, std::string & strResponse);
+
+	/**
+	* @brief HTTP GET请求
+	* @param strUrl 输入参数,请求的Url地址,如:http://www.baidu.com
+	* @param strResponse 输出参数,返回的内容
+	* @return 返回是否Post成功
+	*/
+	int Get(const std::string & strUrl, std::string & strResponse);
+
+	/**
+	* @brief HTTPS POST请求,无证书版本
+	* @param strUrl 输入参数,请求的Url地址,如:https://www.alipay.com
+	* @param strPost 输入参数,使用如下格式para1=val1¶2=val2&…
+	* @param strResponse 输出参数,返回的内容
+	* @param pCaPath 输入参数,为CA证书的路径.如果输入为NULL,则不验证服务器端证书的有效性.
+	* @return 返回是否Post成功
+	*/
+	int Posts(const std::string & strUrl, const std::string & strPost, std::string & strResponse, const char * pCaPath = NULL);
+
+	/**
+	* @brief HTTPS GET请求,无证书版本
+	* @param strUrl 输入参数,请求的Url地址,如:https://www.alipay.com
+	* @param strResponse 输出参数,返回的内容
+	* @param pCaPath 输入参数,为CA证书的路径.如果输入为NULL,则不验证服务器端证书的有效性.
+	* @return 返回是否Post成功
+	*/
+	int Gets(const std::string & strUrl, std::string & strResponse, const char * pCaPath = NULL);
+
+public:
+	void SetDebug(bool bDebug);
+
+private:
+	bool m_bDebug;
+};
+
+#endif
+

api/http/cpp/example.cpp

@@ -0,0 +1,30 @@
+//NOTICE: you need to use libcurl-devel for C++ to use HTTP client, please read client.cpp and client.h seriously
+
+
+#include <stdio.h> 
+#include <iostream>
+#include <string> 
+#include "client.h"
+
+using namespace std;
+
+int main()
+{
+	CHttpClient hc;
+	string res;
+	int ret;
+	//NOTICE: here no need to add admin.html
+	ret = hc.Get("127.0.0.1:8080/build/lubm/data/LUBM_10.n3", res); 
+	cout<<res<<endl;
+	ret = hc.Get("127.0.0.1:8080/load/lubm", res); 
+	cout<<res<<endl;
+	ret = hc.Get("127.0.0.1:8080/query/data/ex0.sql", res); 
+	cout<<res<<endl;
+	ret = hc.Get("127.0.0.1:8080/monitor", res); 
+	cout<<res<<endl;
+	ret = hc.Get("127.0.0.1:8080/unload", res); 
+	cout<<res<<endl;
+
+	return 0;
+}
+