libghttp库下载地址：http://lfs.linuxsir.org/htdocs/blfscvs/gnome/libghttp.html
官方API参考文档：https://sourcecodebrowser.com/libghttp/1.0.9/ghttp_8h.html
将源码包下载下来，进入例行安装流程：
先解压：

tar -xzvf libghttp-1.0.9.tar.gz
cd libghttp-1.0.9

安装：

./configure
make
make install

在安装的过程中可能会遇到一些问题：

checking host system type... Invalid configuration `x86_64-unknown-linux-gnu': machine `x86_64-unknown' not recognized
 
 
checking build system type... Invalid configuration `x86_64-unknown-linux-gnu': machine `x86_64-unknown' not recognized
 
 
checking for ranlib... ranlib
checking for ld used by GCC... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD-compatible nm... /usr/bin/nm -B
checking whether ln -s works... yes
updating cache ./config.cache
ltconfig: you must specify a host type if you use `--no-verify'
Try `ltconfig --help' for more information.
configure: error: libtool configure failed

解决这个问题其实很简单：

# 首先查找一下config.guess和config.sub文件的目录
find / -name config.guess
find / -name config.sub
 
 
# 将查找出来的文件随便选择一个覆盖到软件目录
cp /usr/share/automake-1.11/config.guess .
cp /usr/share/automake-1.11/config.sub .

如果找不到则：

sudo apt-get install automake

下面是我自己封装的一个http客户端，拥有post和get方法：

头文件httpClient.h

/*=========================================================
 *文件名称:  httpClient.h
 *创建日期： 2017-7-6
 *创建者  ： 冷月莫负	  
 *修改记录：
 *  2017-7-6  created
===========================================================*/
#ifndef HTTPCLIENT_H  
#define HTTPCLIENT_H  

#include <map>
#include <string>
using namespace std;

int Get(string url, string params, int timeout, string&result,map<string,string>&m) ;  
int Post(string uri, string params, int timeout, string&result, map<string,string>&m) ;  

#endif

cpp实现文件httpClient.cpp

#include "ghttp.h"  
#include <stdio.h>  
#include <string.h>  
#include <stdlib.h>  
#include <unistd.h>
#include "httpClient.h"
#include "ulaneLog.h"
   
 
int Get(string url, string params, int timeout, string& result,map<string,string>&m) 
{  
	ghttp_status status;
	char* temresult = NULL;
    ghttp_request *request = NULL;  
    request = ghttp_request_new();  
    
	char szUrl[256];
	memset(szUrl,0x00,sizeof(szUrl));
    strcpy(szUrl,url.c_str());
    
	if (ghttp_set_uri(request, szUrl) == -1)  
	{
		ghttp_clean(request); 
		return -1;
	}  
       
    if (ghttp_set_type(request, ghttp_type_get) == -1)  
	{
		ghttp_clean(request); 
        return -1;  
	}
	map<string,string>::iterator it = m.begin();
	for(it;it!=m.end();it++)
	{
		ghttp_set_header(request, it->first.c_str(),it->second.c_str());
	}
    char timeout_str[10];  
    sprintf(timeout_str, "%d", timeout);  
    ghttp_set_header(request, http_hdr_Timeout, timeout_str);
	ghttp_set_sync(request, ghttp_sync);	
     
    ghttp_prepare(request);
    status=ghttp_process(request);
	if (status == ghttp_error)
	{
		ghttp_request_destroy(request);
		return -1;			 
	}		
   
    temresult = ghttp_get_body(request);   
	result += temresult;
    ghttp_request_destroy(request);
    return 0;  
}  
  
int Post(string uri, string params, int timeout, string& result, map<string,string>&m) 
{  
	char* temresult = NULL;
    ghttp_request *request = NULL;  
    ghttp_status status;  
    int len;
	char szUri[256];
	memset(szUri,0x00,sizeof(szUri));
	strcpy(szUri,uri.c_str());
    request = ghttp_request_new();  
   	if (ghttp_set_uri(request, szUri) == -1)  
	{
		ghttp_clean(request); 
		return -1;
	}  
       
    if (ghttp_set_type(request, ghttp_type_post) == -1)  
	{
		ghttp_clean(request); 
        return -1;  
	}
	map<string,string>::iterator it = m.begin();
	for(it;it!=m.end();it++)
	{
		ghttp_set_header(request, it->first.c_str(),it->second.c_str());
	}

	ghttp_set_sync(request, ghttp_sync);  
    char timeout_str[10];  
    sprintf(timeout_str, "%d", timeout);
	ghttp_set_header(request, "Content-Type", "application/json"); 	
    ghttp_set_header(request, http_hdr_Timeout, timeout_str);  

	char szParams[8192];
	memset(szParams,0x00,sizeof(szParams));
	strcpy(szParams,params.c_str());
    len = strlen(szParams);  
    ghttp_set_body(request, szParams, len); //  
    ghttp_prepare(request);  
    status = ghttp_process(request);  
    if (status == ghttp_error)  
    {
		return -1;			 
	}  
    result = ghttp_get_body(request); //test  
	temresult = ghttp_get_body(request);   
	result += temresult;
    ghttp_request_destroy(request); 
    return 0;  
}  

	post和get方法中最后一个参数是一个map<string,string>类型的map容器，使用的时候只需要将你要设置的header都已key:value的形式存到容器中，就都会被设置。

参考文章：
http://blog.csdn.net/earbao/article/details/39007549
http://www.phpjiayuan.com/109/270.html

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