Add a simple utility to dump events as they happen

.gitignore

@@ -6,6 +6,8 @@ test
 test_g
 test_fast
 url_parser
+parsertrace
+parsertrace_g
 *.mk
 *.Makefile
 *.so

Makefile

@@ -55,6 +55,12 @@ library: libhttp_parser.o
 package: http_parser.o
 	$(AR) rcs libhttp_parser.a http_parser.o
 
+parsertrace_g: http_parser_g.o http_parser.h contrib/parsertrace.c
+	$(CC) $(CPPFLAGS_DEBUG) $(CFLAGS_DEBUG) -o parsertrace_g http_parser_g.o contrib/parsertrace.c
+
+parsertrace: http_parser.o http_parser.h contrib/parsertrace.c
+	$(CC) $(CPPFLAGS_FAST) $(CFLAGS_FAST) -o parsertrace http_parser.o contrib/parsertrace.c
+
 tags: http_parser.c http_parser.h test.c
 	ctags $^
 

contrib/parsertrace.c

@@ -0,0 +1,156 @@
+/* Based on src/http/ngx_http_parse.c from NGINX copyright Igor Sysoev
+ *
+ * Additional changes are licensed under the same terms as NGINX and
+ * copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/* Dump what the parser finds to stdout as it happen */
+
+#include "http_parser.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int on_message_begin(http_parser* _) {
+  (void)_;
+  printf("\n***MESSAGE BEGIN***\n\n");
+  return 0;
+}
+
+int on_headers_complete(http_parser* _) {
+  (void)_;
+  printf("\n***HEADERS COMPLETE***\n\n");
+  return 0;
+}
+
+int on_message_complete(http_parser* _) {
+  (void)_;
+  printf("\n***MESSAGE COMPLETE***\n\n");
+  return 0;
+}
+
+int on_url(http_parser* _, const char* at, size_t length) {
+  (void)_;
+  printf("Url: %.*s\n", (int)length, at);
+  return 0;
+}
+
+int on_header_field(http_parser* _, const char* at, size_t length) {
+  (void)_;
+  printf("Header field: %.*s\n", (int)length, at);
+  return 0;
+}
+
+int on_header_value(http_parser* _, const char* at, size_t length) {
+  (void)_;
+  printf("Header value: %.*s\n", (int)length, at);
+  return 0;
+}
+
+int on_body(http_parser* _, const char* at, size_t length) {
+  (void)_;
+  printf("Body: %.*s\n", (int)length, at);
+  return 0;
+}
+
+void usage(const char* name) {
+  fprintf(stderr,
+          "Usage: %s $type $filename\n"
+          "  type: -x, where x is one of {r,b,q}\n"
+          "  parses file as a Response, reQuest, or Both\n",
+          name);
+  exit(EXIT_FAILURE);
+}
+
+int main(int argc, char* argv[]) {
+  enum http_parser_type file_type;
+
+  if (argc != 3) {
+    usage(argv[0]);
+  }
+
+  char* type = argv[1];
+  if (type[0] != '-') {
+    usage(argv[0]);
+  }
+
+  switch (type[1]) {
+    /* in the case of "-", type[1] will be NUL */
+    case 'r':
+      file_type = HTTP_RESPONSE;
+      break;
+    case 'q':
+      file_type = HTTP_REQUEST;
+      break;
+    case 'b':
+      file_type = HTTP_BOTH;
+      break;
+    default:
+      usage(argv[0]);
+  }
+
+  char* filename = argv[2];
+  FILE* file = fopen(filename, "r");
+  if (file == NULL) {
+    perror("fopen");
+    return EXIT_FAILURE;
+  }
+
+  fseek(file, 0, SEEK_END);
+  long file_length = ftell(file);
+  if (file_length == -1) {
+    perror("ftell");
+    return EXIT_FAILURE;
+  }
+  fseek(file, 0, SEEK_SET);
+
+  char* data = malloc(file_length);
+  if (fread(data, 1, file_length, file) != (size_t)file_length) {
+    fprintf(stderr, "couldn't read entire file\n");
+    free(data);
+    return EXIT_FAILURE;
+  }
+
+  http_parser_settings settings;
+  memset(&settings, 0, sizeof(settings));
+  settings.on_message_begin = on_message_begin;
+  settings.on_url = on_url;
+  settings.on_header_field = on_header_field;
+  settings.on_header_value = on_header_value;
+  settings.on_headers_complete = on_headers_complete;
+  settings.on_body = on_body;
+  settings.on_message_complete = on_message_complete;
+
+  http_parser parser;
+  http_parser_init(&parser, file_type);
+  size_t nparsed = http_parser_execute(&parser, &settings, data, file_length);
+  free(data);
+
+  if (nparsed != (size_t)file_length) {
+    fprintf(stderr,
+            "Error: %s (%s)\n",
+            http_errno_description(HTTP_PARSER_ERRNO(&parser)),
+            http_errno_name(HTTP_PARSER_ERRNO(&parser)));
+    return EXIT_FAILURE;
+  }
+
+  return EXIT_SUCCESS;
+}