Update networking layer w/ CURL and emscripten impl

2025-11-08 01:50:36 +11:00
parent a17925904d
commit f6874dc55a
4105 changed files with 694617 additions and 179 deletions
@@ -0,0 +1,163 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * SPDX-License-Identifier: curl
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if !defined(CURL_DISABLE_COOKIES) || !defined(CURL_DISABLE_ALTSVC) ||  \
+  !defined(CURL_DISABLE_HSTS)
+
+#include "urldata.h"
+#include "rand.h"
+#include "curl_fopen.h"
+
+/* The last 2 #include files should be in this order */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+/*
+  The dirslash() function breaks a null-terminated pathname string into
+  directory and filename components then returns the directory component up
+  to, *AND INCLUDING*, a final '/'. If there is no directory in the path,
+  this instead returns a "" string.
+
+  This function returns a pointer to malloc'ed memory.
+
+  The input path to this function is expected to have a filename part.
+*/
+
+#ifdef _WIN32
+#define PATHSEP "\\"
+#define IS_SEP(x) (((x) == '/') || ((x) == '\\'))
+#elif defined(MSDOS) || defined(OS2)
+#define PATHSEP "\\"
+#define IS_SEP(x) ((x) == '\\')
+#else
+#define PATHSEP "/"
+#define IS_SEP(x) ((x) == '/')
+#endif
+
+static char *dirslash(const char *path)
+{
+  size_t n;
+  struct dynbuf out;
+  DEBUGASSERT(path);
+  curlx_dyn_init(&out, CURL_MAX_INPUT_LENGTH);
+  n = strlen(path);
+  if(n) {
+    /* find the rightmost path separator, if any */
+    while(n && !IS_SEP(path[n-1]))
+      --n;
+    /* skip over all the path separators, if any */
+    while(n && IS_SEP(path[n-1]))
+      --n;
+  }
+  if(curlx_dyn_addn(&out, path, n))
+    return NULL;
+  /* if there was a directory, append a single trailing slash */
+  if(n && curlx_dyn_addn(&out, PATHSEP, 1))
+    return NULL;
+  return curlx_dyn_ptr(&out);
+}
+
+/*
+ * Curl_fopen() opens a file for writing with a temp name, to be renamed
+ * to the final name when completed. If there is an existing file using this
+ * name at the time of the open, this function will clone the mode from that
+ * file. if 'tempname' is non-NULL, it needs a rename after the file is
+ * written.
+ */
+CURLcode Curl_fopen(struct Curl_easy *data, const char *filename,
+                    FILE **fh, char **tempname)
+{
+  CURLcode result = CURLE_WRITE_ERROR;
+  unsigned char randbuf[41];
+  char *tempstore = NULL;
+  struct_stat sb;
+  int fd = -1;
+  char *dir = NULL;
+  *tempname = NULL;
+
+  *fh = curlx_fopen(filename, FOPEN_WRITETEXT);
+  if(!*fh)
+    goto fail;
+  if(
+#ifdef UNDER_CE
+     /* !checksrc! disable BANNEDFUNC 1 */
+     stat(filename, &sb) == -1
+#else
+     fstat(fileno(*fh), &sb) == -1
+#endif
+     || !S_ISREG(sb.st_mode)) {
+    return CURLE_OK;
+  }
+  curlx_fclose(*fh);
+  *fh = NULL;
+
+  result = Curl_rand_alnum(data, randbuf, sizeof(randbuf));
+  if(result)
+    goto fail;
+
+  dir = dirslash(filename);
+  if(dir) {
+    /* The temp filename should not end up too long for the target file
+       system */
+    tempstore = curl_maprintf("%s%s.tmp", dir, randbuf);
+    free(dir);
+  }
+
+  if(!tempstore) {
+    result = CURLE_OUT_OF_MEMORY;
+    goto fail;
+  }
+
+  result = CURLE_WRITE_ERROR;
+#if (defined(ANDROID) || defined(__ANDROID__)) && \
+  (defined(__i386__) || defined(__arm__))
+  fd = curlx_open(tempstore, O_WRONLY | O_CREAT | O_EXCL,
+                  (mode_t)(0600 | sb.st_mode));
+#else
+  fd = curlx_open(tempstore, O_WRONLY | O_CREAT | O_EXCL,
+                  0600 | sb.st_mode);
+#endif
+  if(fd == -1)
+    goto fail;
+
+  *fh = curlx_fdopen(fd, FOPEN_WRITETEXT);
+  if(!*fh)
+    goto fail;
+
+  *tempname = tempstore;
+  return CURLE_OK;
+
+fail:
+  if(fd != -1) {
+    close(fd);
+    unlink(tempstore);
+  }
+
+  free(tempstore);
+  return result;
+}
+
+#endif /* ! disabled */