Http library

Hvilke features har du brug for ?

Simple FET og POST requests er nemme at lave med standard sockets (jeg har
postet kode til det mange gange).

Jeg skal bare kunne læse og skrive fra/til txt filer på min egen server.

Du kan hente med en GET - men hvordan vil du skrive ? POST til en ASP/PHP side
som opdaterer filen ?

Ja det må blive med PHP da det er det jeg kan.
Men kan jeg få lidt hjælp til selve C++ koden?

GET / Linux:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include <sys/socket.h>
#include <fcntl.h>
#include <netdb.h>
#include <errno.h>

void get(char *hostname,int port,char *path)
{
  int sd,status,len,ix,tmp;
  char cmd[512],resp[51200];
  struct sockaddr local,remote;
  struct hostent *hostinfo;
  /* create socket */
  sd=socket(AF_INET,SOCK_STREAM,0);
  if(sd<0) {
      printf("Error creating socket: %s\n",strerror(errno));
      goto fin;
  }
  /* bind socket */
  local.sa_family=AF_INET;
  memset(local.sa_data,0,sizeof(local.sa_data));
  status=bind(sd,&local,sizeof(local));
  if(status<0) {
      printf("Error binding socket: %s\n",strerror(errno));
      goto fin;
  }
  /* lookup host */
  hostinfo=gethostbyname(hostname);
  if(!hostinfo) {
      printf("Error looking up host: %s\n",hostname);
      goto fin;
  }
  /* connect to host */
  remote.sa_family=hostinfo->h_addrtype;
  memcpy(remote.sa_data+2,hostinfo->h_addr_list[0],hostinfo->h_length);
  *((short *)remote.sa_data)=port;
  tmp=remote.sa_data[0];
  remote.sa_data[0]=remote.sa_data[1];
  remote.sa_data[1]=tmp;
  status=connect(sd,&remote,sizeof(remote));
  if(status!=0) {
      printf("Error connecting to host: %s port: %d\n",hostname,port);
      goto fin;
  }
  /* send GET request */
  sprintf(cmd,"GET %s HTTP/1.1\r\nHost: %s\r\n\r\n",path,hostname);
  status=send(sd,cmd,strlen(cmd),0);
  if(status<0) {
      printf("Error sending GET request\n");
      goto fin;
  }
  /* read response */
  ix=0;
  while ((len=recv(sd,resp+ix,sizeof(resp)-ix-1,0))>0) {
      ix = ix + len;
      printf("*\n");
  }
  resp[ix]='\0';
  printf("%s",resp);
fin:
  close(sd);
  return;
}

int main(int argc,char *argv[])
{
  get("www.xxxx.dk",80,"/");
}

GET / Windows:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include <windows.h>
#include <errno.h>

void get(char *hostname,int port,char *path,char *fnm)
{
  FILE *fp;
  int sd,status,len,tmp;
  char cmd[512],resp[51200],*p,seg[1024];
  struct sockaddr local,remote;
  struct hostent *hostinfo;
  time_t t;
  /* create socket */
  sd=socket(AF_INET,SOCK_STREAM,0);
  if(sd<0) {
      printf("Error creating socket: %s\n",strerror(errno));
      goto fin;
  }
  /* bind socket */
  local.sa_family=AF_INET;
  memset(local.sa_data,0,sizeof(local.sa_data));
  status=bind(sd,&local,sizeof(local));
  if(status<0) {
      printf("Error binding socket: %s\n",strerror(errno));
      goto fin;
  }
  /* lookup host */
  hostinfo=gethostbyname(hostname);
  if(!hostinfo) {
      printf("Error looking up host: %s\n",hostname);
      goto fin;
  }
  /* connect to host */
  remote.sa_family=hostinfo->h_addrtype;
  memcpy(remote.sa_data+2,hostinfo->h_addr_list[0],hostinfo->h_length);
  *((short *)remote.sa_data)=port;
  tmp=remote.sa_data[0];
  remote.sa_data[0]=remote.sa_data[1];
  remote.sa_data[1]=tmp;
  status=connect(sd,&remote,sizeof(remote));
  if(status!=0) {
      printf("Error connecting to host: %s port: %d\n",hostname,port);
      goto fin;
  }
  /* send GET request */
  sprintf(cmd,"GET %s HTTP/1.1\r\nHost: %s\r\n\r\n",path,hostname);
  status=send(sd,cmd,strlen(cmd),0);
  if(status<0) {
      printf("Error sending POST request\n");
      goto fin;
  }
  /* read response */
  fp = fopen(fnm,"wb");
  len=recv(sd,resp,sizeof(resp),0);
  p = strstr(resp,"\r\n\r\n") + 4;
  fwrite(p,1,len-(p-resp),fp);
  while ((len=recv(sd,resp,sizeof(resp),0))>0) {
      fwrite(resp,1,len,fp);
  }
  fclose(fp);
fin:
  closesocket(sd);
  return;
}

int main(int argc,char *argv[])
{
  WSADATA WSAData;
  WSAStartup(0x0101,&WSAData);
  get("www.domain.dk",80,"/dir/billede.jpg","billede.jpg");
  WSACleanup();
  return 0;
}

Linux eksemplet er en tekst fil. Windows eksempelt er en binær fil.

POST:

sprintf(cmd,"GET %s HTTP/1.1\r\nHost: %s\r\n\r\n%s\r\n",path,hostname,"field1=value1&field2=value");

Alle eksemplerne er simple console app, men selve socket koden kan bruges i enhver
kontekst.

Tak!

Jeg kigger på det lidt senere men du kan bare lægge et svar.

svar