Add option --enable-static-dir=<DIR>, use static

Add option to not fetch mime-type and default to
"application/octet-stream".

CMakeLists.txt

@@ -12,6 +12,7 @@ set(c_simple_http_SOURCES
   "${CMAKE_CURRENT_SOURCE_DIR}/src/http_template.c"
   "${CMAKE_CURRENT_SOURCE_DIR}/src/helpers.c"
   "${CMAKE_CURRENT_SOURCE_DIR}/src/html_cache.c"
+  "${CMAKE_CURRENT_SOURCE_DIR}/src/static.c"
   "${CMAKE_CURRENT_SOURCE_DIR}/third_party/SimpleArchiver/src/helpers.c"
   "${CMAKE_CURRENT_SOURCE_DIR}/third_party/SimpleArchiver/src/data_structures/linked_list.c"
   "${CMAKE_CURRENT_SOURCE_DIR}/third_party/SimpleArchiver/src/data_structures/hash_map.c"

Makefile

@@ -43,7 +43,8 @@ HEADERS = \
 	src/config.h \
 	src/http_template.h \
 	src/helpers.h \
-	src/html_cache.h
+	src/html_cache.h \
+	src/static.h
 
 SOURCES = \
 		src/main.c \
@@ -57,6 +58,7 @@ SOURCES = \
 		src/http_template.c \
 		src/helpers.c \
 		src/html_cache.c \
+		src/static.c \
 		third_party/SimpleArchiver/src/helpers.c \
 		third_party/SimpleArchiver/src/data_structures/linked_list.c \
 		third_party/SimpleArchiver/src/data_structures/hash_map.c \

example_config/example.config

@@ -69,6 +69,8 @@ HTML='''
   <h1>Nested inner: further<h1>
   {{{VAR}}}
   <br>
+  <img src="/silly.jpg" />
+  <br>
   <a href="/inner">back</a>
   </body>
   </html>

src/arg_parse.c

@@ -43,6 +43,7 @@ void print_usage(void) {
   puts("  --enable-reload-config-on-change");
   puts("  --enable-cache-dir=<DIR>");
   puts("  --cache-entry-lifetime-seconds=<SECONDS>");
+  puts("  --enable-static-dir=<DIR>");
 }
 
 Args parse_args(int32_t argc, char **argv) {
@@ -128,6 +129,29 @@ Args parse_args(int32_t argc, char **argv) {
           "NOTICE set cache-entry-lifetime to %lu\n",
           args.cache_lifespan_seconds);
       }
+    } else if (strncmp(argv[0], "--enable-static-dir=", 20) == 0) {
+      args.static_dir = argv[0] + 20;
+      // Check if it actually is an existing directory.
+      DIR *d = opendir(args.static_dir);
+      if (d == NULL) {
+        if (errno == ENOENT) {
+          fprintf(
+            stderr,
+            "ERROR Directory \"%s\" does not exist!\n",
+            args.static_dir);
+          exit(1);
+        } else {
+          fprintf(
+            stderr,
+            "ERROR Failed to open directory \"%s\" (errno %d)!\n",
+            args.static_dir,
+            errno);
+          exit(1);
+        }
+      } else {
+        printf("Directory \"%s\" exists.\n", args.static_dir);
+      }
+      closedir(d);
     } else {
       fprintf(stderr, "ERROR: Invalid args!\n");
       print_usage();

src/arg_parse.h

@@ -38,6 +38,9 @@ typedef struct Args {
   // Does not need to be free'd since it points to a string in argv.
   const char *cache_dir;
   size_t cache_lifespan_seconds;
+  // Non-NULL if static-dir is specified and files in the dir are to be served.
+  // Does not need to be free'd since it points to a string in argv.
+  const char *static_dir;
 } Args;
 
 void print_usage(void);

src/http.c

@@ -65,7 +65,8 @@ char *c_simple_http_request_response(
     C_SIMPLE_HTTP_HTTPTemplates *templates,
     size_t *out_size,
     enum C_SIMPLE_HTTP_ResponseCode *out_response_code,
-    const Args *args) {
+    const Args *args,
+    char **request_path_out) {
   if (out_size) {
     *out_size = 0;
   }
@@ -176,6 +177,11 @@ char *c_simple_http_request_response(
 
   char *generated_buf = NULL;
 
+  if (request_path_out) {
+    *request_path_out =
+      strdup(stripped_path ? stripped_path : request_path_unescaped);
+  }
+
   if (args->cache_dir) {
     int ret = c_simple_http_cache_path(
       stripped_path ? stripped_path : request_path_unescaped,
@@ -212,7 +218,8 @@ char *c_simple_http_request_response(
   }
 
   if (!generated_buf || generated_size == 0) {
-    fprintf(stderr, "ERROR Unable to generate response html for path \"%s\"!\n",
+    fprintf(stderr,
+            "WARNING Unable to generate response html for path \"%s\"!\n",
       request_path);
     if (out_response_code) {
       if (

src/http.h

@@ -50,7 +50,8 @@ char *c_simple_http_request_response(
   C_SIMPLE_HTTP_HTTPTemplates *templates,
   size_t *out_size,
   enum C_SIMPLE_HTTP_ResponseCode *out_response_code,
-  const Args *args
+  const Args *args,
+  char **request_path_out
 );
 
 /// Takes a PATH string and returns a "bare" path.

src/main.c

@@ -42,8 +42,16 @@
 #include "constants.h"
 #include "http.h"
 #include "helpers.h"
+#include "static.h"
 
 #define CHECK_ERROR_WRITE(write_expr) \
+  if (write_expr < 0) { \
+    close(connection_fd); \
+    fprintf(stderr, "ERROR Failed to write to connected peer, closing...\n"); \
+    return 1; \
+  }
+
+#define CHECK_ERROR_WRITE_CONTINUE(write_expr) \
   if (write_expr < 0) { \
     close(connection_fd); \
     fprintf(stderr, "ERROR Failed to write to connected peer, closing...\n"); \
@@ -74,6 +82,31 @@ void c_simple_http_inotify_fd_cleanup(int *fd) {
   }
 }
 
+int c_simple_http_on_error(
+    enum C_SIMPLE_HTTP_ResponseCode response_code,
+    int connection_fd
+) {
+  const char *response = c_simple_http_response_code_error_to_response(
+    response_code);
+  size_t response_size;
+  if (response) {
+    response_size = strlen(response);
+    CHECK_ERROR_WRITE(write(connection_fd, response, response_size));
+  } else {
+    CHECK_ERROR_WRITE(write(
+      connection_fd, "HTTP/1.1 500 Internal Server Error\n", 35));
+    CHECK_ERROR_WRITE(write(connection_fd, "Allow: GET\n", 11));
+    CHECK_ERROR_WRITE(write(connection_fd, "Connection: close\n", 18));
+    CHECK_ERROR_WRITE(write(
+      connection_fd, "Content-Type: text/html\n", 24));
+    CHECK_ERROR_WRITE(write(connection_fd, "Content-Length: 35\n", 19));
+    CHECK_ERROR_WRITE(write(
+      connection_fd, "\n<h1>500 Internal Server Error</h1>\n", 36));
+  }
+
+  return 0;
+}
+
 int main(int argc, char **argv) {
   __attribute__((cleanup(c_simple_http_free_args)))
   Args args = parse_args(argc, argv);
@@ -354,18 +387,23 @@ int main(int argc, char **argv) {
 
       size_t response_size = 0;
       enum C_SIMPLE_HTTP_ResponseCode response_code;
+      __attribute__((cleanup(simple_archiver_helper_cleanup_c_string)))
+      char *request_path = NULL;
       const char *response = c_simple_http_request_response(
         (const char*)recv_buf,
         (uint32_t)read_ret,
         &parsed_config,
         &response_size,
         &response_code,
-        &args);
+        &args,
+        &request_path);
       if (response && response_code == C_SIMPLE_HTTP_Response_200_OK) {
-        CHECK_ERROR_WRITE(write(connection_fd, "HTTP/1.1 200 OK\n", 16));
-        CHECK_ERROR_WRITE(write(connection_fd, "Allow: GET\n", 11));
-        CHECK_ERROR_WRITE(write(connection_fd, "Connection: close\n", 18));
-        CHECK_ERROR_WRITE(write(
+        CHECK_ERROR_WRITE_CONTINUE(write(
+          connection_fd, "HTTP/1.1 200 OK\n", 16));
+        CHECK_ERROR_WRITE_CONTINUE(write(connection_fd, "Allow: GET\n", 11));
+        CHECK_ERROR_WRITE_CONTINUE(write(
+          connection_fd, "Connection: close\n", 18));
+        CHECK_ERROR_WRITE_CONTINUE(write(
           connection_fd, "Content-Type: text/html\n", 24));
         char content_length_buf[128];
         size_t content_length_buf_size = 0;
@@ -386,28 +424,83 @@ int main(int argc, char **argv) {
           continue;
         }
         content_length_buf_size += (size_t)written;
-        CHECK_ERROR_WRITE(write(
+        CHECK_ERROR_WRITE_CONTINUE(write(
           connection_fd, content_length_buf, content_length_buf_size));
-        CHECK_ERROR_WRITE(write(connection_fd, "\n", 1));
-        CHECK_ERROR_WRITE(write(connection_fd, response, response_size));
+        CHECK_ERROR_WRITE_CONTINUE(write(connection_fd, "\n", 1));
+        CHECK_ERROR_WRITE_CONTINUE(write(
+          connection_fd, response, response_size));
 
         free((void*)response);
+      } else if (
+          response_code == C_SIMPLE_HTTP_Response_404_Not_Found
+          && args.static_dir) {
+        __attribute__((cleanup(c_simple_http_cleanup_static_file_info)))
+        C_SIMPLE_HTTP_StaticFileInfo file_info =
+          c_simple_http_get_file(args.static_dir, request_path, 0);
+        if (file_info.result == STATIC_FILE_RESULT_NoXDGMimeAvailable) {
+          file_info = c_simple_http_get_file(args.static_dir, request_path, 1);
+        }
+
+        if (file_info.result != STATIC_FILE_RESULT_OK
+            || !file_info.buf
+            || file_info.buf_size == 0
+            || !file_info.mime_type) {
+          if (file_info.result == STATIC_FILE_RESULT_FileError
+              || file_info.result == STATIC_FILE_RESULT_InternalError) {
+            response_code = C_SIMPLE_HTTP_Response_500_Internal_Server_Error;
+          } else if (file_info.result == STATIC_FILE_RESULT_InvalidParameter) {
+            response_code = C_SIMPLE_HTTP_Response_400_Bad_Request;
           } else {
-        const char *response = c_simple_http_response_code_error_to_response(
-          response_code);
-        if (response) {
-          response_size = strlen(response);
-          CHECK_ERROR_WRITE(write(connection_fd, response, response_size));
+            response_code = C_SIMPLE_HTTP_Response_500_Internal_Server_Error;
+          }
+
+          if (c_simple_http_on_error(response_code, connection_fd)) {
+            continue;
+          }
         } else {
-          CHECK_ERROR_WRITE(write(
-            connection_fd, "HTTP/1.1 500 Internal Server Error\n", 35));
-          CHECK_ERROR_WRITE(write(connection_fd, "Allow: GET\n", 11));
-          CHECK_ERROR_WRITE(write(connection_fd, "Connection: close\n", 18));
-          CHECK_ERROR_WRITE(write(
-            connection_fd, "Content-Type: text/html\n", 24));
-          CHECK_ERROR_WRITE(write(connection_fd, "Content-Length: 35\n", 19));
-          CHECK_ERROR_WRITE(write(
-            connection_fd, "\n<h1>500 Internal Server Error</h1>\n", 36));
+          CHECK_ERROR_WRITE_CONTINUE(write(
+            connection_fd, "HTTP/1.1 200 OK\n", 16));
+          CHECK_ERROR_WRITE_CONTINUE(write(connection_fd, "Allow: GET\n", 11));
+          CHECK_ERROR_WRITE_CONTINUE(write(
+            connection_fd, "Connection: close\n", 18));
+          uint64_t mime_length = strlen(file_info.mime_type);
+          __attribute__((cleanup(simple_archiver_helper_cleanup_c_string)))
+          char *mime_type_buf = malloc(mime_length + 1 + 14 + 1);
+          snprintf(
+            mime_type_buf,
+            mime_length + 1 + 14 + 1,
+            "Content-Type: %s\n",
+            file_info.mime_type);
+          CHECK_ERROR_WRITE_CONTINUE(write(
+            connection_fd, mime_type_buf, mime_length + 1 + 14));
+          uint64_t content_str_len = 0;
+          for(uint64_t buf_size_temp = file_info.buf_size;
+              buf_size_temp > 0;
+              buf_size_temp /= 10) {
+            ++content_str_len;
+          }
+          if (content_str_len == 0) {
+            content_str_len = 1;
+          }
+          __attribute__((cleanup(simple_archiver_helper_cleanup_c_string)))
+          char *content_length_buf = malloc(content_str_len + 1 + 16 + 1);
+          snprintf(
+            content_length_buf,
+            content_str_len + 1 + 16 + 1,
+            "Content-Length: %lu\n",
+            file_info.buf_size);
+          CHECK_ERROR_WRITE_CONTINUE(write(
+            connection_fd, content_length_buf, content_str_len + 1 + 16));
+          CHECK_ERROR_WRITE_CONTINUE(write(connection_fd, "\n", 1));
+          CHECK_ERROR_WRITE_CONTINUE(write(
+            connection_fd, file_info.buf, file_info.buf_size));
+          fprintf(stderr,
+                  "NOTICE Found static file for path \"%s\"\n",
+                  request_path);
+        }
+      } else {
+        if (c_simple_http_on_error(response_code, connection_fd)) {
+          continue;
         }
       }
       close(connection_fd);

src/static.c

@@ -0,0 +1,300 @@
+// ISC License
+// 
+// Copyright (c) 2024 Stephen Seo
+// 
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include "static.h"
+
+// Standard library includes.
+#include <stdio.h>
+#include <stdlib.h>
+
+// Standard C library includes.
+#include <spawn.h>
+
+// Posix includes.
+#include <string.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <unistd.h>
+
+// Third party includes.
+#include "SimpleArchiver/src/helpers.h"
+
+char **environ;
+
+void internal_fd_cleanup_helper(int *fd) {
+  if (fd && *fd >= 0) {
+    close(*fd);
+    *fd = -1;
+  }
+}
+
+void internal_cleanup_file_actions(posix_spawn_file_actions_t **actions) {
+  if (actions && *actions) {
+    posix_spawn_file_actions_destroy(*actions);
+    free(*actions);
+    *actions = NULL;
+  }
+}
+
+void internal_cleanup_prev_cwd(char **path) {
+  if (path && *path) {
+    int ret = chdir(*path);
+    if (ret != 0) {
+      fprintf(stderr, "WARNING: chdir back to cwd failed! (errno %d)\n", errno);
+    }
+    free(*path);
+    *path = NULL;
+  }
+}
+
+int_fast8_t c_simple_http_is_xdg_mime_available(void) {
+  __attribute__((cleanup(internal_fd_cleanup_helper)))
+  int dev_null_fd = open("/dev/null", O_WRONLY);
+
+  __attribute__((cleanup(internal_cleanup_file_actions)))
+  posix_spawn_file_actions_t *actions =
+    malloc(sizeof(posix_spawn_file_actions_t));
+  int ret = posix_spawn_file_actions_init(actions);
+  if (ret != 0) {
+    free(actions);
+    actions = NULL;
+    return 0;
+  }
+
+  posix_spawn_file_actions_adddup2(actions, dev_null_fd, STDOUT_FILENO);
+  posix_spawn_file_actions_adddup2(actions, dev_null_fd, STDERR_FILENO);
+
+  pid_t pid;
+  ret = posix_spawnp(&pid,
+                     "xdg-mime",
+                     actions,
+                     NULL,
+                     (char *const[]){"xdg-mime", "--help", NULL},
+                     environ);
+  if (ret != 0) {
+    return 0;
+  }
+
+  waitpid(pid, &ret, 0);
+
+  return (ret == 0 ? 1 : 0);
+}
+
+void c_simple_http_cleanup_static_file_info(
+    C_SIMPLE_HTTP_StaticFileInfo *file_info) {
+  if (file_info->buf) {
+    free(file_info->buf);
+    file_info->buf = NULL;
+  }
+  file_info->buf_size = 0;
+  if (file_info->mime_type) {
+    free(file_info->mime_type);
+    file_info->mime_type = NULL;
+  }
+}
+
+C_SIMPLE_HTTP_StaticFileInfo c_simple_http_get_file(
+    const char *static_dir, const char *path, int_fast8_t ignore_mime_type) {
+  C_SIMPLE_HTTP_StaticFileInfo file_info;
+  memset(&file_info, 0, sizeof(C_SIMPLE_HTTP_StaticFileInfo));
+
+  if (!static_dir || !path) {
+    file_info.result = STATIC_FILE_RESULT_InvalidParameter;
+    return file_info;
+  } else if (!ignore_mime_type && !c_simple_http_is_xdg_mime_available()) {
+    file_info.result = STATIC_FILE_RESULT_NoXDGMimeAvailable;
+    return file_info;
+  }
+
+  uint64_t buf_size = 128;
+  char *buf = malloc(buf_size);
+  char *ptr;
+  while (1) {
+    ptr = getcwd(buf, buf_size);
+    if (ptr == NULL) {
+      if (errno == ERANGE) {
+        buf_size *= 2;
+        buf = realloc(buf, buf_size);
+        if (buf == NULL) {
+          file_info.result = STATIC_FILE_RESULT_InternalError;
+          return file_info;
+        }
+      } else {
+        free(buf);
+        file_info.result = STATIC_FILE_RESULT_InternalError;
+        return file_info;
+      }
+    } else {
+      break;
+    }
+  }
+
+  __attribute__((cleanup(internal_cleanup_prev_cwd)))
+  char *prev_cwd = buf;
+
+  int ret = chdir(static_dir);
+  if (ret != 0) {
+    fprintf(stderr,
+            "ERROR: Failed to chdir into \"%s\"! (errno %d)\n",
+            static_dir,
+            errno);
+    file_info.result = STATIC_FILE_RESULT_InternalError;
+    return file_info;
+  }
+
+  __attribute__((cleanup(simple_archiver_helper_cleanup_FILE)))
+  FILE *fd = NULL;
+  uint64_t idx = 0;
+  if (path[0] == '/') {
+    for(; path[idx] != 0; ++idx) {
+      if (path[idx] != '/') {
+        break;
+      }
+    }
+    if (path[idx] == 0) {
+      fprintf(stderr, "ERROR: Received invalid path \"%s\"!\n", path);
+      file_info.result = STATIC_FILE_RESULT_InvalidParameter;
+      return file_info;
+    }
+  }
+  fd = fopen(path + idx, "rb");
+
+  if (fd == NULL) {
+    fprintf(stderr, "ERROR: Failed to open path \"%s\"!\n", path + idx);
+    file_info.result = STATIC_FILE_RESULT_FileError;
+    return file_info;
+  }
+
+  fseek(fd, 0, SEEK_END);
+  long long_ret = ftell(fd);
+  if (long_ret < 0) {
+    fprintf(stderr, "ERROR: Failed to seek in path fd \"%s\"!\n", path);
+    file_info.result = STATIC_FILE_RESULT_FileError;
+    return file_info;
+  }
+  fseek(fd, 0, SEEK_SET);
+  file_info.buf_size = (uint64_t)long_ret;
+  file_info.buf = malloc(file_info.buf_size);
+  size_t size_t_ret = fread(file_info.buf, 1, file_info.buf_size, fd);
+  if (size_t_ret != file_info.buf_size) {
+    fprintf(stderr, "ERROR: Failed to read path fd \"%s\"!\n", path);
+    free(file_info.buf);
+    file_info.buf_size = 0;
+    file_info.result = STATIC_FILE_RESULT_FileError;
+    return file_info;
+  }
+
+  simple_archiver_helper_cleanup_FILE(&fd);
+
+  if (ignore_mime_type) {
+    file_info.mime_type = strdup("application/octet-stream");
+  } else {
+    int from_xdg_mime_pipe[2];
+    ret = pipe(from_xdg_mime_pipe);
+
+    __attribute__((cleanup(internal_cleanup_file_actions)))
+    posix_spawn_file_actions_t *actions =
+      malloc(sizeof(posix_spawn_file_actions_t));
+    ret = posix_spawn_file_actions_init(actions);
+    if (ret != 0) {
+      free(actions);
+      actions = NULL;
+      c_simple_http_cleanup_static_file_info(&file_info);
+      close(from_xdg_mime_pipe[1]);
+      close(from_xdg_mime_pipe[0]);
+      file_info.result = STATIC_FILE_RESULT_InternalError;
+      return file_info;
+    }
+
+    posix_spawn_file_actions_adddup2(actions,
+                                     from_xdg_mime_pipe[1],
+                                     STDOUT_FILENO);
+
+    // Close "read" side of pipe on "xdg-mime"'s side.
+    posix_spawn_file_actions_addclose(actions, from_xdg_mime_pipe[0]);
+
+    buf_size = 256;
+    buf = malloc(buf_size);
+    uint64_t buf_idx = 0;
+
+    char *path_plus_idx = (char*)path + idx;
+    pid_t pid;
+    ret = posix_spawnp(&pid,
+                       "xdg-mime",
+                       actions,
+                       NULL,
+                       (char *const[]){"xdg-mime",
+                                       "query",
+                                       "filetype",
+                                       path_plus_idx,
+                                       NULL},
+                       environ);
+    if (ret != 0) {
+      c_simple_http_cleanup_static_file_info(&file_info);
+      close(from_xdg_mime_pipe[1]);
+      close(from_xdg_mime_pipe[0]);
+      file_info.result = STATIC_FILE_RESULT_InternalError;
+      return file_info;
+    }
+
+    close(from_xdg_mime_pipe[1]);
+
+    ssize_t ssize_t_ret;
+    while (1) {
+      ssize_t_ret =
+        read(from_xdg_mime_pipe[0], buf + buf_idx, buf_size - buf_idx);
+      if (ssize_t_ret <= 0) {
+        break;
+      } else {
+        buf_idx += (uint64_t)ssize_t_ret;
+        if (buf_idx >= buf_size) {
+          buf_size *= 2;
+          buf = realloc(buf, buf_size);
+          if (buf == NULL) {
+            c_simple_http_cleanup_static_file_info(&file_info);
+            close(from_xdg_mime_pipe[0]);
+            file_info.result = STATIC_FILE_RESULT_InternalError;
+            return file_info;
+          }
+        }
+      }
+    }
+
+    close(from_xdg_mime_pipe[0]);
+    waitpid(pid, &ret, 0);
+
+    if (ret != 0) {
+      c_simple_http_cleanup_static_file_info(&file_info);
+      file_info.result = STATIC_FILE_RESULT_InternalError;
+      return file_info;
+    }
+
+    buf[buf_idx] = 0;
+    if (buf[buf_idx-1] == '\n') {
+      buf[buf_idx-1] = 0;
+    }
+
+    file_info.mime_type = buf;
+  }
+
+  file_info.result = STATIC_FILE_RESULT_OK;
+  return file_info;
+}
+
+// vim: et ts=2 sts=2 sw=2

src/static.h

@@ -0,0 +1,51 @@
+// ISC License
+// 
+// Copyright (c) 2024 Stephen Seo
+// 
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef SEODISPARATE_COM_C_SIMPLE_HTTP_STATIC_H_
+#define SEODISPARATE_COM_C_SIMPLE_HTTP_STATIC_H_
+
+// Standard library includes.
+#include <stdint.h>
+
+typedef enum C_SIMPLE_HTTP_StaticFileResult {
+  STATIC_FILE_RESULT_OK,
+  STATIC_FILE_RESULT_FileError,
+  STATIC_FILE_RESULT_InvalidParameter,
+  STATIC_FILE_RESULT_NoXDGMimeAvailable,
+  STATIC_FILE_RESULT_InternalError
+} C_SIMPLE_HTTP_StaticFileResult;
+
+typedef struct C_SIMPLE_HTTP_StaticFileInfo {
+  char *buf;
+  uint64_t buf_size;
+  char *mime_type;
+  C_SIMPLE_HTTP_StaticFileResult result;
+} C_SIMPLE_HTTP_StaticFileInfo;
+
+/// Returns non-zero if "xdg_mime" is available.
+int_fast8_t c_simple_http_is_xdg_mime_available(void);
+
+void c_simple_http_cleanup_static_file_info(
+  C_SIMPLE_HTTP_StaticFileInfo *file_info);
+
+/// If ignore_mime_type is non-zero, then mime information will not be fetched.
+/// The mime_type string will therefore default to "application/octet-stream".
+C_SIMPLE_HTTP_StaticFileInfo c_simple_http_get_file(
+  const char *static_dir, const char *path, int_fast8_t ignore_mime_type);
+
+#endif
+
+// vim: et ts=2 sts=2 sw=2

src/test.c

@@ -16,6 +16,7 @@
 #include "http.h"
 #include "html_cache.h"
 #include "constants.h"
+#include "static.h"
 
 // Third party includes.
 #include <SimpleArchiver/src/helpers.h>
@@ -107,7 +108,7 @@ int test_internal_check_matching_string_in_list(void *value, void *ud) {
   return 0;
 }
 
-int main(void) {
+int main(int argc, char **argv) {
   // Test config.
   {
     __attribute__((cleanup(test_internal_cleanup_delete_temporary_file)))
@@ -974,6 +975,35 @@ int main(void) {
     rmdir("/tmp/c_simple_http_cache_dir");
   }
 
+  // Test static.
+  {
+    FILE *fd = fopen("/usr/bin/xdg-mime", "rb");
+    int_fast8_t is_xdg_mime_exists = fd ? 1 : 0;
+    fclose(fd);
+
+    if (is_xdg_mime_exists) {
+      CHECK_TRUE(c_simple_http_is_xdg_mime_available());
+
+      C_SIMPLE_HTTP_StaticFileInfo info = c_simple_http_get_file(".", argv[0], 0);
+      CHECK_TRUE(info.buf);
+      CHECK_TRUE(info.buf_size > 0);
+      CHECK_TRUE(info.mime_type);
+      CHECK_TRUE(info.result == STATIC_FILE_RESULT_OK);
+      printf("unit test mime type is: %s\n", info.mime_type);
+      c_simple_http_cleanup_static_file_info(&info);
+    } else {
+      CHECK_FALSE(c_simple_http_is_xdg_mime_available());
+    }
+
+    C_SIMPLE_HTTP_StaticFileInfo info = c_simple_http_get_file(".", argv[0], 1);
+    CHECK_TRUE(info.buf);
+    CHECK_TRUE(info.buf_size > 0);
+    CHECK_TRUE(info.mime_type);
+    CHECK_TRUE(info.result == STATIC_FILE_RESULT_OK);
+    CHECK_STREQ(info.mime_type, "application/octet-stream");
+    c_simple_http_cleanup_static_file_info(&info);
+  }
+
   RETURN()
 }