cmd: add /status.json to describe what and how it works

util/http/http.c

@@ -17,6 +17,7 @@
 #define HEADER_RANGE "Range:"
 #define HEADER_CONTENT_LENGTH "Content-Length:"
 #define HEADER_USER_AGENT "User-Agent:"
+#define HEADER_HOST "Host:"
 
 static int http_listen(int port, int maxcons)
 {
@@ -92,6 +93,7 @@ static void http_process(http_worker_t *worker, FILE *stream)
 
   worker->range_header[0] = 0;
   worker->user_agent[0] = 0;
+  worker->host[0] = 0;
   worker->content_length = -1;
 
   // request_uri
@@ -124,11 +126,13 @@ static void http_process(http_worker_t *worker, FILE *stream)
       break;
 
     if (strcasestr(line, HEADER_RANGE) == line) {
-      strcpy(worker->range_header, line);
+      strcpy(worker->range_header, trim(line));
     } else if (strcasestr(line, HEADER_CONTENT_LENGTH) == line) {
-      worker->content_length = atoi(line + strlen(HEADER_CONTENT_LENGTH));
+      worker->content_length = atoi(trim(line + strlen(HEADER_CONTENT_LENGTH)));
     } else if (strcasestr(line, HEADER_USER_AGENT) == line) {
-      strcpy(worker->user_agent, line + strlen(HEADER_USER_AGENT));
+      strcpy(worker->user_agent, trim(line + strlen(HEADER_USER_AGENT)));
+    } else if (strcasestr(line, HEADER_HOST) == line) {
+      strcpy(worker->host, trim(line + strlen(HEADER_HOST)));
     }
   }
 

util/http/http.h

@@ -44,6 +44,7 @@ typedef struct http_worker_s {
   char client_method[BUFSIZE];
   char range_header[BUFSIZE];
   char user_agent[BUFSIZE];
+  char host[BUFSIZE];
   char *request_method;
   char *request_uri;
   char *request_params;

util/opts/log.c

@@ -2,6 +2,7 @@
 #include "util/opts/opts.h"
 
 #include <string.h>
+#include <ctype.h>
 
 char *
 strstrn(const char *s, const char *find, size_t len)
@@ -101,3 +102,17 @@ int ioctl_retried(const char *name, int fd, int request, void *arg)
 	}
 	return ret;
 }
+
+char *trim(char *s)
+{
+	// skip left side white spaces
+	while (isspace (*s))
+		s++;
+
+	// skip right side white spaces
+	char *e = s + strlen(s) - 1;
+	while (e >= s && isspace(*e))
+		*e-- = 0;
+
+	return s;
+}

util/opts/log.h

@@ -49,6 +49,7 @@ bool filter_log(const char *filename);
 uint64_t get_monotonic_time_us(struct timespec *ts, struct timeval *tv);
 uint64_t get_time_us(clockid_t clock, struct timespec *ts, struct timeval *tv, int64_t delays_us);
 int shrink_to_block(int size, int block);
+char *trim(char *s);
 
 int ioctl_retried(const char *name, int fd, int request, void *arg);