使用套接字不工作的Http客户端程序

-2

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


/* getLine() Reads a line from a stream and stores it in "string" 


size_t getLine(char **string, FILE *stream) 
{ 
size_t rd=0; 
char s; 
int ln = getline(string,&rd,stream); 

if(ln == -1) 
{ 

return -1; 
} 
return rd; 
} 


/* Convert file descriptor into stream (i.e., FILE*). Exit if there is a 
* failure. */ 

FILE* getStream(int sock) 
{ 
    FILE *fp; 
    fp = fdopen(sock,"a+b"); 

    if(fp == NULL) 
    { 
     fprintf(stderr,"error opening socket\n"); 
     exit(EXIT_FAILURE); 
    } 

    return fp; 
} 

/* Creates a TCP socket and returns the file descriptor for it. */ 

int createSocket(char *hostname, char *port) 
{ 
    if(hostname == NULL || port == NULL) 
    { 
     fprintf(stderr, "One or more parameters passed to createSocket() are NULL\n"); 
     exit(EXIT_FAILURE); 
    } 

    /* Request a TCP connection using the version of IP that is configured 
    on the machine. 
    */ 

    struct addrinfo * result, *h; 
    struct addrinfo hints; 
    memset(&hints, 0, sizeof(hints)); 
    hints.ai_family = AF_INET; 
    hints.ai_socktype = SOCK_STREAM; 
    hints.ai_flags = AI_PASSIVE|AI_ADDRCONFIG; 

    int error = getaddrinfo(hostname, "http", &hints, &result); 

    if(error != 0) 
    { 
     fprintf(stderr,"\n error in getaddrinfo:%s\n",gai_strerror(error)); 
     exit(EXIT_FAILURE); 
    } 

    /* TODO: Create a socket using socket() and the "result" structure. 
    Check for an error. If one occurs, print a message and exit. 
    */ 


    for(h=result; h != NULL; h = h->ai_next) 
    { 
     int sock = socket(h->ai_family, h->ai_socktype, h->ai_protocol); 

     if(sock == -1) 
     { 
      fprintf(stderr,"\nerror in creating Socket"); 
      exit(EXIT_FAILURE); 
     } 



     /* TODO: Call connect() with "sock" and information from the 
     "result" struct to start a TCP connection. Check for error. If 
     one occurs, print message and exit. 
     */ 

     if(connect(sock, h->ai_addr, h->ai_addrlen) == -1) 
     { 
      fprintf(stderr,"\nerror in connecting"); 
      exit(EXIT_FAILURE); 
     } 

     freeaddrinfo(result); 
     return sock; 

    } 
} 


int main(int argc, char *argv[]) 
{ 

    /* TODO: Check number of arguments */ 

    if(argc<2) 
    { 
     printf("expected a name for resolving"); 
     exit(1); 
    } 

    /* Setup socket. */ 

    int sock = createSocket(argv[1], argv[2]); 
    FILE *stream = getStream(sock); 
    printf("\n###### CLIENT IS SENDING THE FOLLOWING TO THE SERVER\n"); 


    /* TODO: Write HTTP request to "stream" */ 

    printf(" GET/HTTP/1.0\n Host: %s\n Connection: close \r\n \r\n", argv[1]); 
    fprintf(stream, "GET/HTTP/1.0\n Host: %s\n Connection: close \r\n \r\n", argv[1]); 

    while(1) // while there is data to read 
    { 
     char *string = NULL; 
     printf("#####CLIENT RECEIVED THE FOLLOWING FROM SERVER\n"); 
     int len = getLine(&string, stream); 
     printf("%s",string); 
     while((len=getLine(&string, stream)) != -1) 
     { 
      printf("%s",string); 
     } 


     fclose(stream); 
     printf("\n##### Connection closed by server\n"); 
     exit(EXIT_SUCCESS); 
     free(string); 

    } // end infinite loop 
}

来源

2013-02-15 user2014111

问题是......什么？找到你的错误？ – WhozCraig 2013-02-15 06:08:02

我不知道我的代码有什么问题，尤其是当我将请求作为GET/HTTPTP1.0时，它从服务器获得响应，但是当我给GET/HTTP/1.0时它没有得到任何响应，请帮助 – user2014111 2013-02-15 06:08:10

不应该*全部*发送的行将由'\ r \ n'终止？ – alk 2013-02-15 06:51:04