linuxc請求http請求_如何用c語言實現http伺服器

㈠在linux下如何利用C語言實現HTTP的get和post方法

下載wget的源碼看看就知道了

㈡怎麼用LINUX發送HTTP請求

之前用GET方式一直不行，介面那邊調出log看滑雀說是空指針，說我們有參悔攔數沒傳過來。我想可能和我傳了多個參數有關。於是我信前早改用POST方式也就是curl -d就可以了。

㈢ linux c++中要如何調用一個http介面

可以使用libcurl 庫

https://curl.haxx.se/libcurl/

#include<stdio.h>
#include<curl/curl.h>

intmain(void)
{
CURL*curl;
CURLcoderes;

curl=curl_easy_init();
if(curl){
curl_easy_setopt(curl,CURLOPT_URL,"curl.haxx.se");
res=curl_easy_perform(curl);

/*alwayscleanup*/
curl_easy_cleanup(curl);
}
return0;
}

更多的例子在這里https://curl.haxx.se/libcurl/c/example.html

㈣設計一個linux c語言，Http協議的伺服器，用socket收發消息，簡單點，求代碼and注釋。

OK
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#include <string.h>

int main(int argc,char *argv[])
{
int sockfd,new_socket;
int sock_value;
char buf[] = "hello! China!I Love You\n";

struct sockaddr_in client_;
struct sockaddr_in server_;

int SIZE = sizeof(struct sockaddr_in);

if(argc != 2){
fprintf(stderr,"The two number!\n");
exit(1);
}

if((sock_value = atoi(argv[1])) < 0){
fprintf(stderr,"socket error!\n");
exit(1);
}

if((sockfd = socket(PF_INET,SOCK_STREAM, 0)) == -1){
perror("socket");
exit(1);
}

bzero(&server_,SIZE);

server_.sin_family = PF_INET;
server_.sin_port = htons(sock_value);
server_.sin_addr.s_addr = INADDR_ANY;

if(bind(sockfd,(struct sockaddr *)(&server_),SIZE) == -1){
perror("bind");
exit(1);
}

if(listen(sockfd, 12) == -1){
perror("listen");
exit(1);
}

printf("Waiting ... ...\n");

while(1){
if((new_socket = accept(sockfd,(struct sockaddr *)(&client_),&SIZE)) == -1){
perror("accept");
exit(1);
}

printf("The client IP is %s\n",inet_ntoa(client_.sin_addr));
printf("The socket is %d\n",ntohs(client_.sin_port));

if(write(new_socket,buf,strlen(buf)) == -1){
perror("write");
exit(1);
}

int my;
char mybuf[1024];

if((my = read(new_socket, mybuf,1024)) == -1){
perror("read");
exit(1);
}

mybuf[my] = '\0';
printf("#++++#++++#:%s\n",mybuf);

close(new_socket);

}

close(sockfd);

return 0;
}

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/ip.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>

int main(int argc,char *argv[])
{
int sockfd;
int sock_value;
char buf[1024];
char mybuf[] = "Linux\n";
int read_count;

struct sockaddr_in client_;
struct sockaddr_in server_;

int SIZE = sizeof(struct sockaddr_in);

if(argc != 3){
fprintf(stderr,"The two number!\n");
exit(1);
}

if((sock_value = atoi(argv[2])) < 0){
fprintf(stderr,"socket error!\n");
exit(1);
}

if((sockfd = socket(PF_INET,SOCK_STREAM, 0)) == -1){
perror("socket");
exit(1);
}

bzero(&client_,SIZE);
bzero(&server_,SIZE);

client_.sin_family = PF_INET;
client_.sin_port = htons(52252);
client_.sin_addr.s_addr = INADDR_ANY;

server_.sin_family = PF_INET;
server_.sin_port = htons(sock_value);
server_.sin_addr.s_addr = inet_addr(argv[1]);

if(connect(sockfd,(struct sockaddr *)(&server_),SIZE) == -1){
perror("connect");
exit(1);
}

if((read_count = read(sockfd,buf,1024)) == -1){
perror("read");
exit(1);
}

buf[read_count] = '\0';
printf("#----#----#:%s\n",buf);

if(write(sockfd, mybuf,6) == -1){
perror("write");
exit(1);
}

close(sockfd);

exit(0);

return 0;
}

㈤如何通過 c/c++ 實現http請求

示常式序，轉載自CNBLOG，做了針對C語言編譯器的適應性修正：

#include<stdio.h>
#include<winsock2.h>

#pragmacomment(lib,"ws2_32.lib")/*WinSock使用的庫函數*/

/*定義常量*/
#defineHTTP_DEF_PORT80/*連接的預設埠*/
#defineHTTP_BUF_SIZE1024/*緩沖區的大小*/
#defineHTTP_HOST_LEN256/*主機名長度*/

char*http_req_hdr_tmpl="GET%sHTTP/1.1
"
"Accept:image/gif,image/jpeg,*/*
Accept-Language:zh-cn
"
"Accept-Encoding:gzip,deflate
Host:%s:%d
"
"User-Agent:Huiyong'sBrowser<0.1>
Connection:Keep-Alive

";


/**************************************************************************
*
*函數功能:解析命令行參數,分別得到主機名,埠號和文件名.命令行格式:
*[http://www..com:8080/index.html]
*
*參數說明:[IN]buf,字元串指針數組;
*[OUT]host,保存主機;
*[OUT]port,埠;
*[OUT]file_name,文件名;
*
*返回值:void.
*
**************************************************************************/
voidhttp_parse_request_url(constchar*buf,char*host,
unsignedshort*port,char*file_name)
{
intlength=0;
charport_buf[8];
char*buf_end=(char*)(buf+strlen(buf));
	char*begin,*host_end,*colon,*file;

/*查找主機的開始位置*/

	begin=(char*)(strstr(buf,"//"));
	begin=(begin?begin+2:(char*)(buf));

colon=strchr(begin,':');
host_end=strchr(begin,'/');

if(host_end==NULL)
{
host_end=buf_end;
}
else
{/*得到文件名*/
file=strrchr(host_end,'/');
if(file&&(file+1)!=buf_end)
			strcpy(file_name,file+1);
	}
if(colon)/*得到埠號*/
{
colon++;

length=host_end-colon;
memcpy(port_buf,colon,length);
port_buf[length]=0;
*port=atoi(port_buf);

host_end=colon-1;
}

/*得到主機信息*/
length=host_end-begin;
memcpy(host,begin,length);
host[length]=0;
}


intmain(intargc,char**argv)
{
WSADATAwsa_data;
SOCKEThttp_sock=0;/*socket句柄*/
structsockaddr_inserv_addr;/*伺服器地址*/
structhostent*host_ent;

intresult=0,send_len;
chardata_buf[HTTP_BUF_SIZE];
charhost[HTTP_HOST_LEN]="127.0.0.1";
unsignedshortport=HTTP_DEF_PORT;
unsignedlongaddr;
charfile_name[HTTP_HOST_LEN]="index.html";
charfile_nameforsave[HTTP_HOST_LEN]="index1.html";
FILE*file_web;

	if(argc!=2)
{
printf("[Web]input:%shttp://www.test.com[:8080]/index.html",argv[0]);
return-1;
}

http_parse_request_url(argv[1],host,&port,file_name);
WSAStartup(MAKEWORD(2,0),&wsa_data);/*初始化WinSock資源*/

addr=inet_addr(host);
if(addr==INADDR_NONE)
{
host_ent=gethostbyname(host);
if(!host_ent)
{
printf("[Web]invalidhost
");
return-1;
}

memcpy(&addr,host_ent->h_addr_list[0],host_ent->h_length);
}

/*伺服器地址*/
serv_addr.sin_family=AF_INET;
serv_addr.sin_port=htons(port);
serv_addr.sin_addr.s_addr=addr;

http_sock=socket(AF_INET,SOCK_STREAM,0);/*創建socket*/
result=connect(http_sock,(structsockaddr*)&serv_addr,sizeof(serv_addr));
if(result==SOCKET_ERROR)/*連接失敗*/
{
closesocket(http_sock);
printf("[Web]failtoconnect,error=%d
",WSAGetLastError());
return-1;
}

/*發送HTTP請求*/
send_len=sprintf(data_buf,http_req_hdr_tmpl,argv[1],host,port);
result=send(http_sock,data_buf,send_len,0);
if(result==SOCKET_ERROR)/*發送失敗*/
{
printf("[Web]failtosend,error=%d
",WSAGetLastError());
return-1;
}

	file_web=fopen(file_nameforsave,"a+");

do/*接收響應並保存到文件中*/
{
result=recv(http_sock,data_buf,HTTP_BUF_SIZE,0);
if(result>0)
{
fwrite(data_buf,1,result,file_web);

/*在屏幕上輸出*/
data_buf[result]=0;
printf("%s",data_buf);
}
}while(result>0);

fclose(file_web);
closesocket(http_sock);
WSACleanup();

return0;
}

㈥ linux下C語言怎麼讀取http文件內容

http是協議
不是文件
你這個說法就有問題了。
如果你想用C讀網頁可以考慮使用socket 不過還是有些麻煩的。

㈦ linux怎麼抓取http請求

①-安裝tcpmp(命令) wireshark（圖形化）
②-tcpmp tcp port 80 -n -X -s 0

###在終端輸出
③-tcpmp tcp port 80 -n -s 0 -w /tmp/tcp.cap
###通過wireshark進行查看
④-tcpmp tcp port 80 -n -s 0 -X -l |grep xxx
###xxx為你要過濾的關鍵字

㈧ c語言實現的http請求中，User-Agent該填什麼

User Agent表示的是客戶端軟體類型，也就是瀏覽器類型

㈨如何用c語言實現http伺服器

去看一下《Advanced Linux Programming》這本書吧，第11章講的就是怎麼用C語言實現一Http伺服器。這里有下載地址（英文的）： http://www.advancedlinuxprogramming.com/alp-folder 英文看起來不順的話可以上網找找有沒有中文版的這本書，應該叫Linux高級編程吧～～～參考資料： http://www.advancedlinuxprogramming.com/alp-folder

㈩ linux對http請求參數長度限制

沒有限制。Linux本身沒有對HTTP請求參數長度做出限制，而察李是由Web伺服器或應用程序自行設置。具體纖沒則來說毀棚，HTTP協議並沒有對請求參數長度做出限制，但不同的Web伺服器或應用程序可能會有自己的限制。

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