diff options
| -rw-r--r-- | Year_3/TSDWL/webserver/server.c | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/Year_3/TSDWL/webserver/server.c b/Year_3/TSDWL/webserver/server.c index e2f6a3e..5eedf70 100644 --- a/Year_3/TSDWL/webserver/server.c +++ b/Year_3/TSDWL/webserver/server.c @@ -3,11 +3,14 @@ * [1] https://it.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Richiesta_GET_e_risposta_di_successo */ #include <arpa/inet.h> +#include <fcntl.h> #include <netinet/in.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/socket.h> +#include <sys/stat.h> +#include <sys/types.h> #include <unistd.h> #define DEFAULT_WWW "./www" @@ -109,6 +112,10 @@ parse_first_line(request_t* request, char* header, size_t len) break; } case 1: { + if (token[0] != '/') { + fprintf(stderr, "'%s' must starts with a '/'\n", token); + goto parse_error; + } strcpy(request->path, token); break; } @@ -142,6 +149,57 @@ parse_error: return -1; } +void +read_file(char* root, char* file, int client) +{ + /* FIXME: In Linux the max name length is 255, but here we include the + * root, and I don't want to use an array of 511 bytes (255*2+1). So I am + * supposing a max path of 300 chars. */ + char path[300]; + char buffer[1024]; + int n; + int fd; + int root_len; + int file_len; + + root_len = strlen(root); + file_len = strlen(file); + + if (root[root_len - 1] == '/') { + root_len--; + } + + /* Considers this kind of path like `/index.html` */ + if (file_len == 1) { + file = "/index.html"; + file_len = strlen(file); + } + + strncpy(path, root, root_len); + strncpy(path + root_len, file, file_len); + + if ((fd = open(path, O_RDONLY)) == -1) { + strcpy(buffer, "Error opening the file on server"); + + /* Write the error to the client and also to the server */ + write(client, buffer, strlen(buffer) + 1); + perror(buffer); + return; + } + + while ((n = read(fd, buffer, sizeof(buffer))) != 0) { + if (n == -1) { + perror("Error reading the file"); + break; + } + + buffer[n] = '\0'; + write(client, buffer, strlen(buffer) + 1); + } + + close(fd); +} + int main(int argc, char* argv[]) { @@ -203,7 +261,11 @@ main(int argc, char* argv[]) write(clientfd, buffer, strlen(buffer) + 1); } - parse_first_line(&request, headers[0], strlen(headers[0])); + if (parse_first_line(&request, headers[0], strlen(headers[0])) > -1) { + if (request.method == GET) { + read_file(www_path, request.path, clientfd); + } + } for (i = 0; i < headers_num; ++i) { free(headers + i); |