diff options
author | 2009-06-23 14:05:12 -0400 | |
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committer | 2009-06-23 14:05:12 -0400 | |
commit | 91faf79d92661a24d5a79f340c54be460b2af431 (patch) | |
tree | e623aac5c0b1237fc0e7d16fa0749b114d18aa6e /src/c/driver.c | |
parent | 5279aee30a3e80436340771adffb4bc9cc7c4718 (diff) |
Factor out common request functionality, in preparation for supporting different protocols
Diffstat (limited to 'src/c/driver.c')
-rw-r--r-- | src/c/driver.c | 481 |
1 files changed, 22 insertions, 459 deletions
diff --git a/src/c/driver.c b/src/c/driver.c index 2140cb2c..56eba9a6 100644 --- a/src/c/driver.c +++ b/src/c/driver.c @@ -14,9 +14,9 @@ #include <mhash.h> #include "urweb.h" +#include "request.h" int uw_backlog = 10; -int uw_bufsize = 1024; typedef struct node { int fd; @@ -54,108 +54,16 @@ static int dequeue() { static pthread_mutex_t queue_mutex = PTHREAD_MUTEX_INITIALIZER; static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER; -#define MAX_RETRIES 5 - -static int try_rollback(uw_context ctx) { - int r = uw_rollback(ctx); - - if (r) { - printf("Error running SQL ROLLBACK\n"); - uw_reset(ctx); - uw_write(ctx, "HTTP/1.1 500 Internal Server Error\n\r"); - uw_write(ctx, "Content-type: text/plain\r\n\r\n"); - uw_write(ctx, "Error running SQL ROLLBACK\n"); - } - - return r; -} - -static uw_context new_context() { - uw_context ctx = uw_init(); - int retries_left = MAX_RETRIES; - - while (1) { - failure_kind fk = uw_begin_init(ctx); - - if (fk == SUCCESS) { - printf("Database connection initialized.\n"); - break; - } else if (fk == BOUNDED_RETRY) { - if (retries_left) { - printf("Initialization error triggers bounded retry: %s\n", uw_error_message(ctx)); - --retries_left; - } else { - printf("Fatal initialization error (out of retries): %s\n", uw_error_message(ctx)); - uw_free(ctx); - return NULL; - } - } else if (fk == UNLIMITED_RETRY) - printf("Initialization error triggers unlimited retry: %s\n", uw_error_message(ctx)); - else if (fk == FATAL) { - printf("Fatal initialization error: %s\n", uw_error_message(ctx)); - uw_free(ctx); - return NULL; - } else { - printf("Unknown uw_begin_init return code!\n"); - uw_free(ctx); - return NULL; - } - } - - return ctx; -} - -#define KEYSIZE 16 -#define PASSSIZE 4 - -#define HASH_ALGORITHM MHASH_SHA256 -#define HASH_BLOCKSIZE 32 -#define KEYGEN_ALGORITHM KEYGEN_MCRYPT - -int uw_hash_blocksize = HASH_BLOCKSIZE; - -static int password[PASSSIZE]; -static unsigned char private_key[KEYSIZE]; - -static void init_crypto() { - KEYGEN kg = {{HASH_ALGORITHM, HASH_ALGORITHM}}; - int i; - - assert(mhash_get_block_size(HASH_ALGORITHM) == HASH_BLOCKSIZE); - - for (i = 0; i < PASSSIZE; ++i) - password[i] = rand(); - - if (mhash_keygen_ext(KEYGEN_ALGORITHM, kg, - private_key, sizeof(private_key), - (unsigned char*)password, sizeof(password)) < 0) { - printf("Key generation failed\n"); - exit(1); - } -} - -void uw_sign(const char *in, char *out) { - MHASH td; - - td = mhash_hmac_init(HASH_ALGORITHM, private_key, sizeof(private_key), - mhash_get_hash_pblock(HASH_ALGORITHM)); - - mhash(td, in, strlen(in)); - if (mhash_hmac_deinit(td, out) < 0) - printf("Signing failed"); -} - static void *worker(void *data) { - int me = *(int *)data, retries_left = MAX_RETRIES; - uw_context ctx = new_context(); + int me = *(int *)data; + uw_context ctx = uw_request_new_context(); size_t buf_size = 2; char *buf = malloc(buf_size); - size_t path_copy_size = 0; - char *path_copy = malloc(path_copy_size); + uw_request_context rc = uw_new_request_context(); while (1) { - char *back = buf, *s, *post; - int sock, dont_close = 0; + char *back = buf; + int sock; pthread_mutex_lock(&queue_mutex); while (empty()) @@ -166,8 +74,8 @@ static void *worker(void *data) { printf("Handling connection with thread #%d.\n", me); while (1) { - unsigned retries_left = MAX_RETRIES; int r; + char *s1, *s2; if (back - buf == buf_size - 1) { char *new_buf; @@ -189,358 +97,40 @@ static void *worker(void *data) { break; } - //printf("Received %d bytes.\n", r); - back += r; *back = 0; - if (s = strstr(buf, "\r\n\r\n")) { - failure_kind fk; - int is_post = 0, do_normal_send = 1; - char *boundary = NULL; - size_t boundary_len; - char *cmd, *path, *headers, *inputs, *after_headers; - - //printf("All: %s\n", buf); - - s[2] = 0; - after_headers = s + 4; - - if (!(s = strstr(buf, "\r\n"))) { - fprintf(stderr, "No newline in buf\n"); - break; - } - - *s = 0; - headers = s + 2; - cmd = s = buf; - - //printf("Read: %s\n", buf); - - if (!strsep(&s, " ")) { - fprintf(stderr, "No first space in HTTP command\n"); - break; - } - - uw_set_headers(ctx, headers); - - if (!strcmp(cmd, "POST")) { - char *clen_s = uw_Basis_requestHeader(ctx, "Content-length"); - if (!clen_s) { - fprintf(stderr, "No Content-length with POST\n"); - goto done; - } - int clen = atoi(clen_s); - if (clen < 0) { - fprintf(stderr, "Negative Content-length with POST\n"); - goto done; - } - - while (back - after_headers < clen) { - if (back - buf == buf_size - 1) { - char *new_buf; - buf_size *= 2; - new_buf = realloc(buf, buf_size); - - back = new_buf + (back - buf); - headers = new_buf + (headers - buf); - uw_headers_moved(ctx, headers); - after_headers = new_buf + (after_headers - buf); - s = new_buf + (s - buf); - - buf = new_buf; - } - - r = recv(sock, back, buf_size - 1 - (back - buf), 0); - - if (r < 0) { - fprintf(stderr, "Recv failed\n"); - goto done; - } - - if (r == 0) { - printf("Connection closed.\n"); - goto done; - } - - back += r; - *back = 0; - } + if ((s1 = strstr(buf, "\r\n\r\n"))) { + request_result rr; - is_post = 1; + if ((s2 = strcasestr(buf, "\r\nContent-Length: ")) && s2 < s1) { + int clen; - clen_s = uw_Basis_requestHeader(ctx, "Content-type"); - if (clen_s && !strncasecmp(clen_s, "multipart/form-data", 19)) { - if (strncasecmp(clen_s + 19, "; boundary=", 11)) { - fprintf(stderr, "Bad multipart boundary spec"); - break; - } - - boundary = clen_s + 28; - boundary[0] = '-'; - boundary[1] = '-'; - boundary_len = strlen(boundary); - } - } else if (strcmp(cmd, "GET")) { - fprintf(stderr, "Not ready for non-GET/POST command: %s\n", cmd); - break; - } - - path = s; - if (!strsep(&s, " ")) { - fprintf(stderr, "No second space in HTTP command\n"); - break; - } - - if (!strcmp(path, "/.msgs")) { - char *id = uw_Basis_requestHeader(ctx, "UrWeb-Client"); - char *pass = uw_Basis_requestHeader(ctx, "UrWeb-Pass"); - - if (id && pass) { - unsigned idn = atoi(id); - uw_client_connect(idn, atoi(pass), sock); - dont_close = 1; - fprintf(stderr, "Processed request for messages by client %u\n\n", idn); - } - else { - fprintf(stderr, "Missing fields in .msgs request: %s, %s\n\n", id, pass); - } - break; - } - - if (boundary) { - char *part = after_headers, *after_sub_headers, *header, *after_header; - size_t part_len; - - part = strstr(part, boundary); - if (!part) { - fprintf(stderr, "Missing first multipart boundary\n"); + if (sscanf(s2 + 18, "%d\r\n", &clen) != 1) { + fprintf(stderr, "Malformed Content-Length header\n"); break; } - part += boundary_len; - - while (1) { - char *name = NULL, *filename = NULL, *type = NULL; - - if (part[0] == '-' && part[1] == '-') - break; - - if (*part != '\r') { - fprintf(stderr, "No \\r after multipart boundary\n"); - goto done; - } - ++part; - if (*part != '\n') { - fprintf(stderr, "No \\n after multipart boundary\n"); - goto done; - } - ++part; - - if (!(after_sub_headers = strstr(part, "\r\n\r\n"))) { - fprintf(stderr, "Missing end of headers after multipart boundary\n"); - goto done; - } - after_sub_headers[2] = 0; - after_sub_headers += 4; - - for (header = part; after_header = strstr(header, "\r\n"); header = after_header + 2) { - char *colon, *after_colon; - - *after_header = 0; - if (!(colon = strchr(header, ':'))) { - fprintf(stderr, "Missing colon in multipart sub-header\n"); - goto done; - } - *colon++ = 0; - if (*colon++ != ' ') { - fprintf(stderr, "No space after colon in multipart sub-header\n"); - goto done; - } - - if (!strcasecmp(header, "Content-Disposition")) { - if (strncmp(colon, "form-data; ", 11)) { - fprintf(stderr, "Multipart data is not \"form-data\"\n"); - goto done; - } - - for (colon += 11; after_colon = strchr(colon, '='); colon = after_colon) { - char *data; - after_colon[0] = 0; - if (after_colon[1] != '"') { - fprintf(stderr, "Disposition setting is missing initial quote\n"); - goto done; - } - data = after_colon+2; - if (!(after_colon = strchr(data, '"'))) { - fprintf(stderr, "Disposition setting is missing final quote\n"); - goto done; - } - after_colon[0] = 0; - ++after_colon; - if (after_colon[0] == ';' && after_colon[1] == ' ') - after_colon += 2; - - if (!strcasecmp(colon, "name")) - name = data; - else if (!strcasecmp(colon, "filename")) - filename = data; - } - } else if (!strcasecmp(header, "Content-Type")) { - type = colon; - } - } - - part = memmem(after_sub_headers, back - after_sub_headers, boundary, boundary_len); - if (!part) { - fprintf(stderr, "Missing boundary after multipart payload\n"); - goto done; - } - part[-2] = 0; - part_len = part - after_sub_headers - 2; - part[0] = 0; - part += boundary_len; - - if (filename) { - uw_Basis_file f = {filename, type, {part_len, after_sub_headers}}; - - if (uw_set_file_input(ctx, name, f)) { - puts(uw_error_message(ctx)); - goto done; - } - } else if (uw_set_input(ctx, name, after_sub_headers)) { - puts(uw_error_message(ctx)); - goto done; - } - } - } - else { - if (is_post) - inputs = after_headers; - else if (inputs = strchr(path, '?')) - *inputs++ = 0; - - if (inputs) { - char *name, *value; - - while (*inputs) { - name = inputs; - if (inputs = strchr(inputs, '&')) - *inputs++ = 0; - else - inputs = strchr(name, 0); - - if (value = strchr(name, '=')) { - *value++ = 0; - if (uw_set_input(ctx, name, value)) { - puts(uw_error_message(ctx)); - goto done; - } - } - else if (uw_set_input(ctx, name, "")) { - puts(uw_error_message(ctx)); - goto done; - } - } - } - } - - printf("Serving URI %s....\n", path); - - while (1) { - size_t path_len = strlen(path); - - uw_write_header(ctx, "HTTP/1.1 200 OK\r\n"); - - if (path_len + 1 > path_copy_size) { - path_copy_size = path_len + 1; - path_copy = realloc(path_copy, path_copy_size); - } - strcpy(path_copy, path); - fk = uw_begin(ctx, path_copy); - if (fk == SUCCESS || fk == RETURN_BLOB) { - uw_commit(ctx); - break; - } else if (fk == BOUNDED_RETRY) { - if (retries_left) { - printf("Error triggers bounded retry: %s\n", uw_error_message(ctx)); - --retries_left; - } - else { - printf("Fatal error (out of retries): %s\n", uw_error_message(ctx)); - - try_rollback(ctx); - - uw_reset_keep_error_message(ctx); - uw_write_header(ctx, "HTTP/1.1 500 Internal Server Error\n\r"); - uw_write_header(ctx, "Content-type: text/plain\r\n"); - uw_write(ctx, "Fatal error (out of retries): "); - uw_write(ctx, uw_error_message(ctx)); - uw_write(ctx, "\n"); - - break; - } - } else if (fk == UNLIMITED_RETRY) - printf("Error triggers unlimited retry: %s\n", uw_error_message(ctx)); - else if (fk == FATAL) { - printf("Fatal error: %s\n", uw_error_message(ctx)); - - try_rollback(ctx); - - uw_reset_keep_error_message(ctx); - uw_write_header(ctx, "HTTP/1.1 500 Internal Server Error\r\n"); - uw_write_header(ctx, "Content-type: text/html\r\n"); - uw_write(ctx, "<html><head><title>Fatal Error</title></head><body>"); - uw_write(ctx, "Fatal error: "); - uw_write(ctx, uw_error_message(ctx)); - uw_write(ctx, "\n</body></html>"); - - break; - } else { - printf("Unknown uw_handle return code!\n"); - - try_rollback(ctx); - uw_reset_keep_request(ctx); - uw_write_header(ctx, "HTTP/1.1 500 Internal Server Error\n\r"); - uw_write_header(ctx, "Content-type: text/plain\r\n"); - uw_write(ctx, "Unknown uw_handle return code!\n"); - - break; - } - - if (try_rollback(ctx)) - break; - - uw_reset_keep_request(ctx); + if (s1 + 4 + clen > back) + continue; } + rr = uw_request(rc, ctx, buf, back - buf, sock); uw_send(ctx, sock); - printf("Done with client.\n\n"); - uw_memstats(ctx); + if (rr == SERVED || rr == FAILED) + close(sock); + else if (rr != KEEP_OPEN) + fprintf(stderr, "Illegal uw_request return code: %d\n", rr); + break; } } - done: - if (!dont_close) - close(sock); uw_reset(ctx); } } -static void *client_pruner(void *data) { - uw_context ctx = new_context(); - - if (!ctx) - exit(1); - - while (1) { - uw_prune_clients(ctx); - sleep(5); - } -} - static void help(char *cmd) { printf("Usage: %s [-p <port>] [-t <thread-count>]\n", cmd); } @@ -550,32 +140,6 @@ static void sigint(int signum) { exit(0); } -static void initialize() { - uw_context ctx; - failure_kind fk; - - init_crypto(); - - ctx = new_context(); - - if (!ctx) - exit(1); - - for (fk = uw_initialize(ctx); fk == UNLIMITED_RETRY; fk = uw_initialize(ctx)) { - printf("Unlimited retry during init: %s\n", uw_error_message(ctx)); - uw_db_rollback(ctx); - uw_reset(ctx); - } - - if (fk != SUCCESS) { - printf("Failed to initialize database! %s\n", uw_error_message(ctx)); - uw_db_rollback(ctx); - exit(1); - } - - uw_free(ctx); -} - int main(int argc, char *argv[]) { // The skeleton for this function comes from Beej's sockets tutorial. int sockfd; // listen on sock_fd @@ -622,8 +186,7 @@ int main(int argc, char *argv[]) { } } - uw_global_init(); - initialize(); + uw_request_init(); names = calloc(nthreads, sizeof(int)); |