-move templating logic to libtalertemplating of exchange

1 files changed, 0 insertions, 452 deletions

diff --git a/src/backend/taler-merchant-httpd_templating.c b/src/backend/taler-merchant-httpd_templating.c
deleted file mode 100644
index 9d7766b9..00000000
--- a/src/backend/taler-merchant-httpd_templating.c
+++ /dev/null
@@ -1,452 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2020 Taler Systems SA
-
-  TALER is free software; you can redistribute it and/or modify it under the
-  terms of the GNU General Public License as published by the Free Software
-  Foundation; either version 3, or (at your option) any later version.
-
-  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
-  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
-  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License along with
-  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
-*/
-/**
- * @file taler-merchant-httpd_templating.c
- * @brief logic to load and complete HTML templates
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <gnunet/gnunet_util_lib.h>
-#include <taler/taler_util.h>
-#include <taler/taler_mhd_lib.h>
-#include "taler-merchant-httpd_templating.h"
-#include "../mustach/mustach.h"
-#include "../mustach/mustach-jansson.h"
-#include <gnunet/gnunet_mhd_compat.h>
-
-
-/**
- * Entry in a key-value array we use to cache templates.
- */
-struct TVE
-{
-  /**
-   * A name, used as the key. NULL for the last entry.
-   */
-  char *name;
-
-  /**
-   * Language the template is in.
-   */
-  char *lang;
-
-  /**
-   * 0-terminated (!) file data to return for @e name and @e lang.
-   */
-  char *value;
-
-};
-
-
-/**
- * Array of templates loaded into RAM.
- */
-static struct TVE *loaded;
-
-/**
- * Length of the #loaded array.
- */
-static unsigned int loaded_length;
-
-
-/**
- * Load Mustach template into memory.  Note that we intentionally cache
- * failures, that is if we ever failed to load a template, we will never try
- * again.
- *
- * @param connection the connection we act upon
- * @param name name of the template file to load
- *        (MUST be a 'static' string in memory!)
- * @return NULL on error, otherwise the template
- */
-static const char *
-lookup_template (struct MHD_Connection *connection,
-                 const char *name)
-{
-  struct TVE *best = NULL;
-  const char *lang;
-
-  lang = MHD_lookup_connection_value (connection,
-                                      MHD_HEADER_KIND,
-                                      MHD_HTTP_HEADER_ACCEPT_LANGUAGE);
-  if (NULL == lang)
-    lang = "en";
-  /* find best match by language */
-  for (unsigned int i = 0; i<loaded_length; i++)
-  {
-    if (0 != strcmp (loaded[i].name,
-                     name))
-      continue; /* does not match by name */
-    if ( (NULL == best) ||
-         (TALER_language_matches (lang,
-                                  loaded[i].lang) >
-          TALER_language_matches (lang,
-                                  best->lang) ) )
-      best = &loaded[i];
-  }
-  if (NULL == best)
-  {
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "No templates found in `%s'\n",
-                name);
-    return NULL;
-  }
-  return best->value;
-}
-
-/**
- * Get the base URL for static resources.
- *
- * @param con the MHD connection
- * @param instance_id the instance ID
- * @returns the static files base URL, guaranteed
- *          to have a trailing slash.
- */
-static char *
-make_static_url (struct MHD_Connection *con,
-                     const char *instance_id)
-{
-  const char *host;
-  const char *forwarded_host;
-  const char *uri_path;
-  struct GNUNET_Buffer buf = { 0 };
-
-  host = MHD_lookup_connection_value (con,
-                                      MHD_HEADER_KIND,
-                                      "Host");
-  forwarded_host = MHD_lookup_connection_value (con,
-                                                MHD_HEADER_KIND,
-                                                "X-Forwarded-Host");
-
-  uri_path = MHD_lookup_connection_value (con,
-                                          MHD_HEADER_KIND,
-                                          "X-Forwarded-Prefix");
-  if (NULL != forwarded_host)
-    host = forwarded_host;
-
-  if (NULL == host)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-
-  GNUNET_assert (NULL != instance_id);
-
-  if (GNUNET_NO == TALER_mhd_is_https (con))
-    GNUNET_buffer_write_str (&buf,
-                             "http://");
-  else
-    GNUNET_buffer_write_str (&buf,
-                             "https://");
-  GNUNET_buffer_write_str (&buf,
-                           host);
-  if (NULL != uri_path)
-    GNUNET_buffer_write_path (&buf,
-                              uri_path);
-  if (0 != strcmp ("default",
-                   instance_id))
-  {
-    GNUNET_buffer_write_path (&buf,
-                              "instances");
-    GNUNET_buffer_write_path (&buf,
-                              instance_id);
-  }
-  GNUNET_buffer_write_path (&buf,
-                            "static/");
-  return GNUNET_buffer_reap_str (&buf);
-}
-
-
-
-
-/**
- * Load a @a template and substitute using @a root, returning
- * the result to the @a connection with the given
- * @a http_status code.
- *
- * @param connection the connection we act upon
- * @param http_status code to use on success
- * @param template basename of the template to load
- * @param instance_id instance ID, used to compute static files URL
- * @param taler_uri value for "Taler:" header to set, or NULL
- * @param root JSON object to pass as the root context
- * @return #GNUNET_OK on success (reply queued), #GNUNET_NO if an error was queued,
- *         #GNUNET_SYSERR on failure (to queue an error)
- */
-enum GNUNET_GenericReturnValue
-TMH_return_from_template (struct MHD_Connection *connection,
-                          unsigned int http_status,
-                          const char *template,
-                          const char *instance_id,
-                          const char *taler_uri,
-                          json_t *root)
-{
-  struct MHD_Response *reply;
-  char *body;
-  size_t body_size;
-
-  {
-    const char *tmpl;
-    int eno;
-
-    tmpl = lookup_template (connection,
-                            template);
-    if (NULL == tmpl)
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                  "Failed to load template `%s'\n",
-                  template);
-      if (MHD_YES !=
-          TALER_MHD_reply_with_error (connection,
-                                      MHD_HTTP_NOT_ACCEPTABLE,
-                                      TALER_EC_MERCHANT_GENERIC_FAILED_TO_LOAD_TEMPLATE,
-                                      template))
-        return GNUNET_SYSERR;
-      return GNUNET_NO;
-    }
-    /* Add default values to the context */
-    {
-      char *static_url = make_static_url (connection,
-                                          instance_id);
-      json_object_set (root,
-                       "static_url",
-                       json_string (static_url));
-      GNUNET_free (static_url);
-    }
-    if (0 !=
-        (eno = mustach_jansson (tmpl,
-                                root,
-                                &body,
-                                &body_size)))
-    {
-      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                  "mustach failed on template `%s' with error %d\n",
-                  template,
-                  eno);
-      if (MHD_YES !=
-          TALER_MHD_reply_with_error (connection,
-                                      MHD_HTTP_INTERNAL_SERVER_ERROR,
-                                      TALER_EC_MERCHANT_GENERIC_FAILED_TO_EXPAND_TEMPLATE,
-                                      template))
-        return GNUNET_SYSERR;
-      return GNUNET_NO;
-    }
-  }
-
-  /* try to compress reply if client allows it */
-  {
-    bool compressed = false;
-
-    if (MHD_YES ==
-        TALER_MHD_can_compress (connection))
-    {
-      compressed = TALER_MHD_body_compress ((void **) &body,
-                                            &body_size);
-    }
-    reply = MHD_create_response_from_buffer (body_size,
-                                             body,
-                                             MHD_RESPMEM_MUST_FREE);
-    if (NULL == reply)
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-    if (compressed)
-    {
-      if (MHD_NO ==
-          MHD_add_response_header (reply,
-                                   MHD_HTTP_HEADER_CONTENT_ENCODING,
-                                   "deflate"))
-      {
-        GNUNET_break (0);
-        MHD_destroy_response (reply);
-        return GNUNET_SYSERR;
-      }
-    }
-  }
-
-  /* Add standard headers */
-  if (NULL != taler_uri)
-    GNUNET_break (MHD_NO !=
-                  MHD_add_response_header (reply,
-                                           "Taler",
-                                           taler_uri));
-  GNUNET_break (MHD_NO !=
-                MHD_add_response_header (reply,
-                                         MHD_HTTP_HEADER_CONTENT_TYPE,
-                                         "text/html"));
-
-  /* Actually return reply */
-  {
-    MHD_RESULT ret;
-
-    ret = MHD_queue_response (connection,
-                              http_status,
-                              reply);
-    MHD_destroy_response (reply);
-    if (MHD_NO == ret)
-      return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Function called with a template's filename.
- *
- * @param cls closure
- * @param filename complete filename (absolute path)
- * @return #GNUNET_OK to continue to iterate,
- *  #GNUNET_NO to stop iteration with no error,
- *  #GNUNET_SYSERR to abort iteration with error!
- */
-static int
-load_template (void *cls,
-               const char *filename)
-{
-  char *lang;
-  char *end;
-  int fd;
-  struct stat sb;
-  char *map;
-  const char *name;
-
-  if ('.' == filename[0])
-    return GNUNET_OK;
-
-  name = strrchr (filename,
-                  '/');
-  if (NULL == name)
-    name = filename;
-  else
-    name++;
-  lang = strchr (name,
-                 '.');
-  if (NULL == lang)
-    return GNUNET_OK; /* name must include .$LANG */
-  lang++;
-  end = strchr (lang,
-                '.');
-  if ( (NULL == end) ||
-       (0 != strcmp (end,
-                     ".must")) )
-    return GNUNET_OK; /* name must end with '.must' */
-
-  /* finally open template */
-  fd = open (filename,
-             O_RDONLY);
-  if (-1 == fd)
-  {
-    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
-                              "open",
-                              filename);
-
-    return GNUNET_SYSERR;
-  }
-  if (0 !=
-      fstat (fd,
-             &sb))
-  {
-    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
-                              "open",
-                              filename);
-    GNUNET_break (0 == close (fd));
-    return GNUNET_OK;
-  }
-  map = GNUNET_malloc_large (sb.st_size + 1);
-  if (NULL == map)
-  {
-    GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
-                         "malloc");
-    GNUNET_break (0 == close (fd));
-    return GNUNET_SYSERR;
-  }
-  if (sb.st_size !=
-      read (fd,
-            map,
-            sb.st_size))
-  {
-    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
-                              "read",
-                              filename);
-    GNUNET_break (0 == close (fd));
-    return GNUNET_OK;
-  }
-  GNUNET_break (0 == close (fd));
-  GNUNET_array_grow (loaded,
-                     loaded_length,
-                     loaded_length + 1);
-  loaded[loaded_length - 1].name = GNUNET_strndup (name,
-                                                   (lang - 1) - name);
-  loaded[loaded_length - 1].lang = GNUNET_strndup (lang,
-                                                   end - lang);
-  loaded[loaded_length - 1].value = map;
-  return GNUNET_OK;
-}
-
-
-/**
- * Preload templates.
- */
-int
-TMH_templating_init ()
-{
-  char *dn;
-  int ret;
-
-  {
-    char *path;
-
-    path = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_DATADIR);
-    if (NULL == path)
-    {
-      GNUNET_break (0);
-      return GNUNET_SYSERR;
-    }
-    GNUNET_asprintf (&dn,
-                     "%s/merchant/templates/",
-                     path);
-    GNUNET_free (path);
-  }
-  ret = GNUNET_DISK_directory_scan (dn,
-                                    &load_template,
-                                    NULL);
-  GNUNET_free (dn);
-  if (-1 == ret)
-  {
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Nicely shut down.
- */
-void __attribute__ ((destructor))
-templating_fini ()
-{
-  for (unsigned int i = 0; i<loaded_length; i++)
-  {
-    GNUNET_free (loaded[i].name);
-    GNUNET_free (loaded[i].lang);
-    GNUNET_free (loaded[i].value);
-  }
-  GNUNET_array_grow (loaded,
-                     loaded_length,
-                     0);
-}