[C] 类似于HttpClient的C语言实现Http POST功能如何实现？

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[C] 类似于HttpClient的C语言实现Http POST功能如何实现？5

想自己写个客户端，模拟浏览器向服务器(如lighttpd等)上传数据。用HTTPrequest抓了包，以下为发送的数据内容：

引用

POST /upload.php HTTP/1.0
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/msword, application/vnd.ms-powerpoint, */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0
Content-Length: 180
Host: 192.168.1.180
Content-Type: application/x-www-form-urlencoded

-----------------------------7d93a924b05a2
Content-Disposition: form-data; name="upload_file"; filename="C:\tmp\hello.txt"
Content-Type: text/plain

在实现时，代码大致如下：

#include<stdio.h>
#include<string.h>
#include<sys/socket.h>
#include<stdlib.h>
#include<netinet/in.h>

// post a big file
#define Req "POST /upload.php HTTP/1.0\r\n"	\
						"Accept:image/gif, image/x-xbitmap, image/jpeg, image/pjepg, application/vnd.ms-excel, application/msword, applicationvnd.ms-powerpoint, */*\r\n"	\
						"Accept-Language:en-us\r\n"	\
						"Accept-Encoding:gzip, deflate\r\n"	\
						"User-Agent:Mozilla/4.0\r\n"	\
						"Host:192.168.1.180\r\n"	\
						"Content-Type:application/x-www-urlencoded\r\n"	\
						"-----------------------------7d91a515b05a2\r\n"	\
						"Content-Disposition:form-data;name=\"upload_file\";filename=\"tmp.gz\"\r\n"	\
						"Content-Type:application/x-gzip\r\n"


#define DST_IP "192.168.1.180"
#define ReqLen sizeof(Req)

int main()
{
	struct sockaddr_in srv;
	int sock, nbytes;
	char sndbuf[1024] = {0};
	char recbuf[1024] = {0};

	if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
	{
		fprintf(stderr, "socket() error!\n");
		exit(1);
	}

	srv.sin_family = AF_INET;
	srv.sin_addr.s_addr = inet_addr(DST_IP);
	srv.sin_port = htons(80);

	if((connect(sock, (struct sockaddr *)&srv, sizeof(struct sockaddr))) == -1)
	{
		printf("connect() error!\n");
		exit(1);
	}


	strncpy(sndbuf, Req, ReqLen);
	if(write(sock, sndbuf, ReqLen) == -1)
	{
		fprintf(stderr, "write() error!\n");
		exit(1);
	}

	// get response
	int bytes;
	while(1)
	{
				nbytes = read(sock, recbuf, 1023);
				if(nbytes < 0)
						break;
				recbuf[nbytes] = '\0';
				printf(recbuf);
	}

	close(sock);

	return 0;
}

先怀疑对HTTP请求的数据封装的格式不对，每次运行client，总会提示400-bad request!这样的错误～～

原本的目标是向lighttpd服务器上传数据(文件较大，一般不小于1G)，然后在服务器自己写个cgi来接受/处理数据。现在对上传这部分很头大，看了好久http协议了～～

不知道有没有更好的方法～～请路过的各位大侠多多指教～～谢过～～

.

2009年10月09日 18:08

zero1
10
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4个答案按时间排序按投票排序

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#define Req "POST /upload HTTP/1.0\r\n" \
                           "Accept:image/gif, image/x-xbitmap, image/jpeg, image/pjepg, application/vnd.ms-excel, application/msword, applicationvnd.ms-powerpoint, */*\r\n" \
                           "Accept-Language:en-us\r\n" \
                           "Accept-Encoding:gzip, deflate\r\n" \
                           "User-Agent:Mozilla/4.0\r\n"    \
                           "Host:192.168.1.108:3000\r\n"    \
                           "Content-Type:multipart/form-data, boundary=----1234567--\r\n\r\n" \
                           "Content-Length: 13\r\n" \
                           "----1234567--\r\n" \
                           "Content-Disposition:form-data;name=\"upload_file\";filename=\"tmp.gz\"\r\n"    \
                           "Content-Transfer-Encoding: binary\r\n" \
                           "Content-Type:application/x-gzip\r\n\r\n" \
                        "replace content"

用用这个头试试

2009年10月15日 11:48