Hello everyone, this is my issue: answering with the user-agent works, while answering with the path and echoing the message doesn’t work. Have absolutely no idea why, the printf(message) outputs the right answer. Any help is kindly appreciated.
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
const int BUFFER_SIZE = 256;
int main() {
// Disable output buffering
setbuf(stdout, NULL);
// for debugging -> printf("Logs from your program will appear here!\n");
//declaring variables ->
int client_fd, server_fd, client_addr_len;
struct sockaddr_in client_addr;
//checking possible socket creation ->
server_fd = socket(AF_INET, SOCK_STREAM, 0); //socket descriptor
if (server_fd == -1) {
printf("Socket creation failed by server-side: %s...\n", strerror(errno));
return 1;
}
// Since the tester restarts your program quite often, setting REUSE_PORT
// ensures that we don't run into 'Address already in use' errors
int reuse = 1;
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEPORT, &reuse, sizeof(reuse)) < 0) {
printf("SO_REUSEPORT failed: %s \n", strerror(errno));
return 1;
}
//socket creation server side ->
struct sockaddr_in serv_addr = { .sin_family = AF_INET ,
.sin_port = htons(4221),
.sin_addr = { htonl(INADDR_ANY) },
};
//checking for successful binding ->
if (bind(server_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) != 0) {
printf("Bind failed: %s \n", strerror(errno));
return 1;
}
//checking for successful listening ->
int connection_backlog = 5;
if (listen(server_fd, connection_backlog) != 0) {
printf("Listen failed: %s \n", strerror(errno));
return 1;
}
printf("Waiting for a client to connect...\n");
client_addr_len = sizeof(client_addr);
//accepting client from server ->
client_fd = accept(server_fd, (struct sockaddr *) &client_addr, &client_addr_len);
if(client_fd == -1){
printf("Unable to accept connection, error %s \n", strerror(errno));
return 1;
}
printf("Client connected\n");
FILE *f = fdopen(client_fd, "r");
char method[2048], path[2048], message[4096], host[1024], agent[1024];
fscanf(f, "%s %s HTTP/1.1\r\nHost: %s\r\nUser-Agent: %s", method, path, host,
agent);
if(strlen(path) == 1 && strncmp(path, "/", 1) == 0){ //200 response
sprintf(message, "HTTP/1.1 200 OK\r\n\r\n");
}
else if(strncmp(path, "/user-agent", 11) == 0){ //output the user agent
sprintf(message, "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: %d\r\n\r\n%s", strlen(agent), agent);
}
else if(strncmp(path, "/echo/", 6) == 0){//output the echo -> HERE'S THE PROBLEM
char echoing[256];
sscanf(path, "/echo/%s", echoing);
sprintf(message, "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: %ld\r\n\r\n%s",
strlen(echoing), echoing);
printf("Message: %s", message);
write(client_fd, message, strlen(message));
}
else{ //output error 404
sprintf(message, "HTTP/1.1 404 Not Found\r\n\r\n");
}
write(client_fd, message, strlen(message));
fclose(f);
close(client_fd);
return 0;
}
And here’s the logs:
[tester::#FS3] Running tests for Stage #FS3 (Read header)
[tester::#FS3] $ ./your_server.sh
[your_program] Waiting for a client to connect...
[tester::#FS3] $ curl -v -X GET http://localhost:4221/user-agent -H "User-Agent: orange/mango"
[your_program] Client connected
[tester::#FS3] Received response with 200 status code
[tester::#FS3] ✓ Content-Type header is present
[tester::#FS3] ✓ Content-Length header is present
[tester::#FS3] ✓ Body is correct
[tester::#FS3] Test passed.
[tester::#CN2] Running tests for Stage #CN2 (Respond with body)
[tester::#CN2] $ ./your_server.sh
[your_program] Waiting for a client to connect...
[tester::#CN2] $ curl -v -X GET http://localhost:4221/echo/blueberry
[your_program] Client connected
[your_program] Message: HTTP/1.1 200 OK
[tester::#CN2] Failed to read response:
[tester::#CN2] Received: "" (no content received)
[tester::#CN2] ^ error
[tester::#CN2] Error: Expected: HTTP-version, Received: ""
[tester::#CN2] Test failed (try setting 'debug: true' in your codecrafters.yml to see more details)
[your_program] Content-Type: text/plain
[your_program] Content-Length: 9
[your_program]
[your_program] blueberry
