diff options
| author |  Adam Chlipala <adamc@hcoop.net> | 2008-07-29 15:25:42 -0400 |
|---|---|---|
| committer | Adam Chlipala <adamc@hcoop.net> | 2008-07-29 15:25:42 -0400 |
| commit | cb3b3831a07d6674a5fa02e3e8a1e4329b58cb34 (patch) | |
| tree | 7b6064344549091735d28d42ac9fb19073e9760a /src/c/driver.c | |
| parent | 6855e4766fa8d07e2f3e3cd468de6c58fed0c903 (diff) | |
Unurlifying a datatype; longjmp-based error signaling mechanism
Diffstat (limited to 'src/c/driver.c')
| -rw-r--r-- | src/c/driver.c | 62 |
1 files changed, 55 insertions, 7 deletions
diff --git a/src/c/driver.c b/src/c/driver.c index 90538104..21001d0c 100644 --- a/src/c/driver.c +++ b/src/c/driver.c @@ -13,8 +13,6 @@ int lw_port = 8080; int lw_backlog = 10; int lw_bufsize = 1024; -void lw_handle(lw_context, char*); - typedef struct node { int fd; struct node *next; @@ -51,6 +49,8 @@ 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 void *worker(void *data) { int me = *(int *)data; lw_context ctx = lw_init(1024, 1024); @@ -68,6 +68,7 @@ static void *worker(void *data) { printf("Handling connection with thread #%d.\n", me); while (1) { + unsigned retries_left = MAX_RETRIES; int r = recv(sock, back, lw_bufsize - (back - buf), 0); if (r < 0) { @@ -138,11 +139,58 @@ static void *worker(void *data) { printf("Serving URI %s....\n", path); - lw_write (ctx, "HTTP/1.1 200 OK\r\n"); - lw_write(ctx, "Content-type: text/html\r\n\r\n"); - lw_write(ctx, "<html>"); - lw_handle(ctx, path); - lw_write(ctx, "</html>"); + while (1) { + failure_kind fk; + + lw_write(ctx, "HTTP/1.1 200 OK\r\n"); + lw_write(ctx, "Content-type: text/html\r\n\r\n"); + lw_write(ctx, "<html>"); + + fk = lw_begin(ctx, path); + if (fk == SUCCESS) { + lw_write(ctx, "</html>"); + break; + } else if (fk == BOUNDED_RETRY) { + if (retries_left) { + printf("Error triggers bounded retry: %s\n", lw_error_message(ctx)); + --retries_left; + } + else { + printf("Fatal error (out of retries): %s\n", lw_error_message(ctx)); + + lw_reset_keep_error_message(ctx); + lw_write(ctx, "HTTP/1.1 500 Internal Server Error\n\r"); + lw_write(ctx, "Content-type: text/plain\r\n\r\n"); + lw_write(ctx, "Fatal error (out of retries): "); + lw_write(ctx, lw_error_message(ctx)); + lw_write(ctx, "\n"); + } + } else if (fk == UNLIMITED_RETRY) + printf("Error triggers unlimited retry: %s\n", lw_error_message(ctx)); + else if (fk == FATAL) { + printf("Fatal error: %s\n", lw_error_message(ctx)); + + lw_reset_keep_error_message(ctx); + lw_write(ctx, "HTTP/1.1 500 Internal Server Error\n\r"); + lw_write(ctx, "Content-type: text/plain\r\n\r\n"); + lw_write(ctx, "Fatal error: "); + lw_write(ctx, lw_error_message(ctx)); + lw_write(ctx, "\n"); + + break; + } else { + printf("Unknown lw_handle return code!\n"); + + lw_reset_keep_request(ctx); + lw_write(ctx, "HTTP/1.1 500 Internal Server Error\n\r"); + lw_write(ctx, "Content-type: text/plain\r\n\r\n"); + lw_write(ctx, "Unknown lw_handle return code!\n"); + + break; + } + + lw_reset_keep_request(ctx); + } lw_send(ctx, sock); |