Argthtjtr

I need simple HTTP client on Raspberry PI zero with Raspbian. I used few example codes, but when i send about 7 requests then i can download just page with this error:
503 Service temporarily unavailable
There is no available fastcgi process to fullfill your request.

One of used codes:

#include <arpa/inet.h>

#include <assert.h>

#include <errno.h>

#include <netinet/in.h>

#include <signal.h>

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/wait.h>

#include <netdb.h>

#include <unistd.h>

#define SA      struct sockaddr

#define MAXLINE 4096

#define MAXSUB  200



ssize_t process_http(int sockfd, char *host, char *page)

{

    ssize_t n;

      snprintf(sendline, MAXSUB,

                 "GET %srn"

                 "Host: %srn"

                 "Connection: closen"

                "n", page, host);



        write(sockfd, sendline, strlen(sendline));



        while ((n = read(sockfd, recvline, MAXLINE)) > 0)

         {

    recvline[n] = '';

    }

        printf("%s", recvline);





        return n;

}

and in main is this:

 int sockfd;

        struct sockaddr_in servaddr;



        char **pptr;



        char *hname = "plankter.cz";

        char *page = "http://plankter.cz/iot/list.json";



        char str[50];

        struct hostent *hptr;

        if ((hptr = gethostbyname(hname)) == NULL) {

                fprintf(stderr, " gethostbyname error for host: %s: %s",

                        hname, hstrerror(h_errno));

                exit(1);

        }

        printf("hostname: %sn", hptr->h_name);

        if (hptr->h_addrtype == AF_INET

            && (pptr = hptr->h_addr_list) != NULL) {

                printf("address: %sn",

                       inet_ntop(hptr->h_addrtype, *pptr, str,

                                 sizeof(str)));

        } else {

                fprintf(stderr, "Error call inet_ntop n");

        }



        sockfd = socket(AF_INET, SOCK_STREAM, 0);

        bzero(&servaddr, sizeof(servaddr));

        servaddr.sin_family = AF_INET;

        servaddr.sin_port = htons(80);

        inet_pton(AF_INET, str, &servaddr.sin_addr);



        connect(sockfd, (SA *) & servaddr, sizeof(servaddr));

        process_http(sockfd, hname, page);

        close(sockfd);

In this example i download json, but when i read php or txt, i have same problem. I tried some another example codes using sockets, example with happyhttp library and all give me same result after 7 requests. I think it doesn't close connection. I need to send http request and recieve data, and i need to do it few times in minute.

Thanks for all ideas.

You provide a full URI to the GET field:

char *page = "http://plankter.cz/iot/list.json";

...

snprintf(sendline, MAXSUB,

            "GET %srn"

            "Host: %srn"

            "Connection: closen"

            "n", page, host);

You should not include protocol and host name.

Try this instead:

char *page = "/iot/list.json";