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flatpak-utils-http.c
1530 lines (1260 loc) · 46.9 KB
/
flatpak-utils-http.c
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/* vi:set et sw=2 sts=2 cin cino=t0,f0,(0,{s,>2s,n-s,^-s,e-s:
* Copyright © 2018 Red Hat, Inc
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http:https://www.gnu.org/licenses/>.
*
* Authors:
* Alexander Larsson <[email protected]>
*/
#include "config.h"
#include <gio/gio.h>
#include <glib-unix.h>
#include "flatpak-utils-http-private.h"
#include "flatpak-uri-private.h"
#include "flatpak-oci-registry-private.h"
#include <gio/gunixoutputstream.h>
#include "libglnx.h"
#include <sys/types.h>
#include <sys/xattr.h>
#if defined(HAVE_CURL)
#include <curl/curl.h>
/* These macros came from 7.43.0, but we want to check
* for versions a bit earlier than that (to work on CentOS 7),
* so define them here if we're using an older version.
*/
#ifndef CURL_VERSION_BITS
#define CURL_VERSION_BITS(x,y,z) ((x)<<16|(y)<<8|z)
#endif
#ifndef CURL_AT_LEAST_VERSION
#define CURL_AT_LEAST_VERSION(x,y,z) (LIBCURL_VERSION_NUM >= CURL_VERSION_BITS(x, y, z))
#endif
#elif defined(HAVE_SOUP)
#include <libsoup/soup.h>
#if !defined(SOUP_AUTOCLEANUPS_H) && !defined(__SOUP_AUTOCLEANUPS_H__)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SoupSession, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SoupMessage, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SoupRequest, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SoupRequestHTTP, g_object_unref)
G_DEFINE_AUTOPTR_CLEANUP_FUNC (SoupURI, soup_uri_free)
#endif
#else
# error "No HTTP backend enabled"
#endif
#define FLATPAK_HTTP_TIMEOUT_SECS 60
/* copied from libostree */
#define DEFAULT_N_NETWORK_RETRIES 5
G_DEFINE_QUARK (flatpak_http_error, flatpak_http_error)
/* Information about the cache status of a file.
Encoded in an xattr on the cached file, or a file on the side if xattrs don't work.
*/
typedef struct
{
char *uri;
char *etag;
gint64 last_modified;
gint64 expires;
} CacheHttpData;
typedef struct
{
GMainContext *context;
gboolean done;
GError *error;
/* Input args */
FlatpakHTTPFlags flags;
const char *auth;
const char *token;
FlatpakLoadUriProgress progress;
GCancellable *cancellable;
gpointer user_data;
CacheHttpData *cache_data;
/* Output from the request, set even on http server errors */
guint64 downloaded_bytes;
int status;
char *hdr_content_type;
char *hdr_www_authenticate;
char *hdr_etag;
char *hdr_last_modified;
char *hdr_cache_control;
char *hdr_expires;
char *hdr_content_encoding;
/* Data destination */
GOutputStream *out; /*or */
GString *content; /* or */
GLnxTmpfile *out_tmpfile;
int out_tmpfile_parent_dfd;
/* Used during operation */
char buffer[16 * 1024];
guint64 last_progress_time;
gboolean store_compressed;
} LoadUriData;
static void
clear_load_uri_data_headers (LoadUriData *data)
{
g_clear_pointer (&data->hdr_content_type, g_free);
g_clear_pointer (&data->hdr_www_authenticate, g_free);
g_clear_pointer (&data->hdr_etag, g_free);
g_clear_pointer (&data->hdr_last_modified, g_free);
g_clear_pointer (&data->hdr_last_modified, g_free);
g_clear_pointer (&data->hdr_cache_control, g_free);
g_clear_pointer (&data->hdr_expires, g_free);
g_clear_pointer (&data->hdr_content_encoding, g_free);
}
/* Reset between requests retries */
static void
reset_load_uri_data (LoadUriData *data)
{
g_clear_error (&data->error);
data->status = 0;
data->downloaded_bytes = 0;
if (data->content)
g_string_set_size (data->content, 0);
clear_load_uri_data_headers (data);
if (data->out_tmpfile)
{
glnx_tmpfile_clear (data->out_tmpfile);
g_clear_pointer (&data->out, g_object_unref);
}
/* Reset the progress */
if (data->progress)
data->progress (0, data->user_data);
}
/* Free allocated data at end of full repeated download */
static void
clear_load_uri_data (LoadUriData *data)
{
if (data->content)
{
g_string_free (data->content, TRUE);
data->content = NULL;
}
g_clear_error (&data->error);
clear_load_uri_data_headers (data);
}
G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(LoadUriData, clear_load_uri_data)
static gboolean
check_http_status (guint status_code,
GError **error)
{
GQuark domain;
int code;
if (status_code >= 200 && status_code < 300)
return TRUE;
switch (status_code)
{
case 304: /* Not Modified */
domain = FLATPAK_HTTP_ERROR;
code = FLATPAK_HTTP_ERROR_NOT_CHANGED;
break;
case 401: /* Unauthorized */
domain = FLATPAK_HTTP_ERROR;
code = FLATPAK_HTTP_ERROR_UNAUTHORIZED;
break;
case 403: /* Forbidden */
case 404: /* Not found */
case 410: /* Gone */
domain = G_IO_ERROR;
code = G_IO_ERROR_NOT_FOUND;
break;
case 408: /* Request Timeout */
domain = G_IO_ERROR;
code = G_IO_ERROR_TIMED_OUT;
break;
case 500: /* Internal Server Error */
/* The server did return something, but it was useless to us, so that’s basically equivalent to not returning */
domain = G_IO_ERROR;
code = G_IO_ERROR_HOST_UNREACHABLE;
break;
default:
domain = G_IO_ERROR;
code = G_IO_ERROR_FAILED;
}
g_set_error (error, domain, code,
"Server returned status %u",
status_code);
return FALSE;
}
#if defined(HAVE_CURL)
/************************************************************************
* Curl implementation *
************************************************************************/
typedef struct curl_slist auto_curl_slist;
G_DEFINE_AUTOPTR_CLEANUP_FUNC (auto_curl_slist, curl_slist_free_all)
struct FlatpakHttpSession {
CURL *curl;
GMutex lock;
};
static void
check_header(char **value_out,
const char *header,
char *buffer,
size_t realsize)
{
size_t hlen = strlen (header);
if (realsize < hlen + 1)
return;
if (!g_ascii_strncasecmp(buffer, header, hlen) == 0 ||
buffer[hlen] != ':')
return;
buffer += hlen + 1;
realsize -= hlen + 1;
while (realsize > 0 && g_ascii_isspace (*buffer))
{
buffer++;
realsize--;
}
while (realsize > 0 && g_ascii_isspace (buffer[realsize-1]))
realsize--;
g_free (*value_out); /* Use the last header */
*value_out = g_strndup (buffer, realsize);
}
static size_t
_header_cb (char *buffer,
size_t size,
size_t nitems,
void *userdata)
{
size_t realsize = size * nitems;
LoadUriData *data = (LoadUriData *)userdata;
check_header(&data->hdr_content_type, "content-type", buffer, realsize);
check_header(&data->hdr_www_authenticate, "WWW-Authenticate", buffer, realsize);
check_header(&data->hdr_etag, "ETag", buffer, realsize);
check_header(&data->hdr_last_modified, "Last-Modified", buffer, realsize);
check_header(&data->hdr_cache_control, "Cache-Control", buffer, realsize);
check_header(&data->hdr_expires, "Expires", buffer, realsize);
check_header(&data->hdr_content_encoding, "Content-Encoding", buffer, realsize);
return realsize;
}
static size_t
_write_cb (void *content_data,
size_t size,
size_t nmemb,
void *userp)
{
size_t realsize = size * nmemb;
LoadUriData *data = (LoadUriData *)userp;
gsize n_written = 0;
/* If first write to tmpfile, initiate if needed */
if (data->content == NULL && data->out == NULL &&
data->out_tmpfile != NULL)
{
g_autoptr(GOutputStream) out = NULL;
g_autoptr(GError) tmp_error = NULL;
if (!glnx_open_tmpfile_linkable_at (data->out_tmpfile_parent_dfd, ".",
O_WRONLY, data->out_tmpfile,
&tmp_error))
{
g_warning ("Failed to open http tmpfile: %s\n", tmp_error->message);
return 0; /* This short read will make curl report an error */
}
out = g_unix_output_stream_new (data->out_tmpfile->fd, FALSE);
if (data->store_compressed &&
g_strcmp0 (data->hdr_content_encoding, "gzip") != 0)
{
g_autoptr(GZlibCompressor) compressor = g_zlib_compressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP, -1);
data->out = g_converter_output_stream_new (out, G_CONVERTER (compressor));
}
else
{
data->out = g_steal_pointer (&out);
}
}
if (data->content)
{
g_string_append_len (data->content, content_data, realsize);
n_written = realsize;
}
else if (data->out)
{
/* We ignore the error here, but reporting a short read will make curl report the error */
g_output_stream_write_all (data->out, content_data, realsize,
&n_written, NULL, NULL);
}
data->downloaded_bytes += realsize;
if (g_get_monotonic_time () - data->last_progress_time > 1 * G_USEC_PER_SEC)
{
if (data->progress)
data->progress (data->downloaded_bytes, data->user_data);
data->last_progress_time = g_get_monotonic_time ();
}
return realsize;
}
FlatpakHttpSession *
flatpak_create_http_session (const char *user_agent)
{
FlatpakHttpSession *session = g_new0 (FlatpakHttpSession, 1);
CURLcode rc;
CURL *curl;
session->curl = curl = curl_easy_init();
g_assert (session->curl != NULL);
g_mutex_init (&session->lock);
curl_easy_setopt (curl, CURLOPT_USERAGENT, user_agent);
#if CURL_AT_LEAST_VERSION(7, 85, 0)
rc = curl_easy_setopt (curl, CURLOPT_PROTOCOLS_STR, "http,https");
#else
rc = curl_easy_setopt (curl, CURLOPT_PROTOCOLS, (long)(CURLPROTO_HTTP | CURLPROTO_HTTPS));
#endif
g_assert_cmpint (rc, ==, CURLM_OK);
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
/* Note: curl automatically respects the http_proxy env var */
if (g_getenv ("OSTREE_DEBUG_HTTP"))
curl_easy_setopt (curl, CURLOPT_VERBOSE, 1L);
/* Picked the current version in F25 as of 20170127, since
* there are numerous HTTP/2 fixes since the original version in
* libcurl 7.43.0.
*/
#if CURL_AT_LEAST_VERSION(7, 51, 0)
if ((curl_version_info (CURLVERSION_NOW))->features & CURL_VERSION_HTTP2) {
rc = curl_easy_setopt (curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);
g_assert_cmpint (rc, ==, CURLM_OK);
}
#endif
/* https://github.com/curl/curl/blob/curl-7_53_0/docs/examples/http2-download.c */
#if (CURLPIPE_MULTIPLEX > 0)
/* wait for pipe connection to confirm */
rc = curl_easy_setopt (curl, CURLOPT_PIPEWAIT, 1L);
g_assert_cmpint (rc, ==, CURLM_OK);
#endif
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, _write_cb);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, _header_cb);
/* Abort the connection if connecting to the server takes too long. This
* timeout has no effect after a connection is established. */
curl_easy_setopt (curl, CURLOPT_CONNECTTIMEOUT, (long)FLATPAK_HTTP_TIMEOUT_SECS);
/* Abort the download if it’s slower than 10KB/sec for 60 seconds. An example
* compressed summary file is 1.5MB in size, so anything slower than this rate
* will mean it takes over 2.5 minutes to download just the summary file. */
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, (long)FLATPAK_HTTP_TIMEOUT_SECS);
curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 10000L);
return session;
}
void
flatpak_http_session_free (FlatpakHttpSession* session)
{
g_mutex_lock (&session->lock);
curl_easy_cleanup (session->curl);
g_mutex_unlock (&session->lock);
g_mutex_clear (&session->lock);
g_free (session);
}
static void
set_error_from_curl (GError **error,
const char *uri,
CURLcode res)
{
GQuark domain = G_IO_ERROR;
int code;
switch (res)
{
case CURLE_COULDNT_CONNECT:
case CURLE_COULDNT_RESOLVE_HOST:
case CURLE_COULDNT_RESOLVE_PROXY:
code = G_IO_ERROR_HOST_NOT_FOUND;
break;
case CURLE_OPERATION_TIMEDOUT:
code = G_IO_ERROR_TIMED_OUT;
break;
default:
code = G_IO_ERROR_FAILED;
}
g_set_error (error, domain, code,
"While fetching %s: [%u] %s", uri, res,
curl_easy_strerror (res));
}
static gboolean
flatpak_download_http_uri_once (FlatpakHttpSession *session,
LoadUriData *data,
const char *uri,
GError **error)
{
CURLcode res;
g_autofree char *auth_header = NULL;
g_autofree char *cache_header = NULL;
g_autoptr(auto_curl_slist) header_list = NULL;
g_autoptr(GMutexLocker) curl_lock = g_mutex_locker_new (&session->lock);
long response;
CURL *curl = session->curl;
g_info ("Loading %s using curl", uri);
curl_easy_setopt (curl, CURLOPT_URL, uri);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, (void *)data);
curl_easy_setopt (curl, CURLOPT_HEADERDATA, (void *)data);
if (data->flags & FLATPAK_HTTP_FLAGS_HEAD)
curl_easy_setopt (curl, CURLOPT_NOBODY, 1L);
else
curl_easy_setopt (curl, CURLOPT_HTTPGET, 1L);
if (data->flags & FLATPAK_HTTP_FLAGS_ACCEPT_OCI)
header_list = curl_slist_append (header_list,
"Accept: " FLATPAK_OCI_MEDIA_TYPE_IMAGE_MANIFEST ", " FLATPAK_DOCKER_MEDIA_TYPE_IMAGE_MANIFEST2 ", " FLATPAK_OCI_MEDIA_TYPE_IMAGE_INDEX);
if (data->auth)
auth_header = g_strdup_printf ("Authorization: Basic %s", data->auth);
else if (data->token)
auth_header = g_strdup_printf ("Authorization: Bearer %s", data->token);
if (auth_header)
header_list = curl_slist_append (header_list, auth_header);
if (data->cache_data)
{
CacheHttpData *cache_data = data->cache_data;
if (cache_data->etag && cache_data->etag[0])
cache_header = g_strdup_printf ("If-None-Match: %s", cache_data->etag);
else if (cache_data->last_modified != 0)
{
g_autoptr(GDateTime) date = g_date_time_new_from_unix_utc (cache_data->last_modified);
g_autofree char *date_str = flatpak_format_http_date (date);
cache_header = g_strdup_printf ("If-Modified-Since: %s", date_str);
}
if (cache_header)
header_list = curl_slist_append (header_list, cache_header);
}
curl_easy_setopt (curl, CURLOPT_HTTPHEADER, header_list);
if (data->flags & FLATPAK_HTTP_FLAGS_STORE_COMPRESSED)
{
curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "gzip");
curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 0L);
data->store_compressed = TRUE;
}
else
{
/* enable all supported built-in compressions */
curl_easy_setopt(curl, CURLOPT_ACCEPT_ENCODING, "");
curl_easy_setopt(curl, CURLOPT_HTTP_CONTENT_DECODING, 1L);
data->store_compressed = FALSE;
}
res = curl_easy_perform (session->curl);
curl_easy_setopt (session->curl, CURLOPT_HTTPHEADER, NULL); /* Don't point to freed list */
if (res != CURLE_OK)
{
set_error_from_curl (error, uri, res);
/* Make sure we clear the tmpfile stream we possible created during the request */
if (data->out_tmpfile && data->out)
g_clear_pointer (&data->out, g_object_unref);
return FALSE;
}
if (data->out_tmpfile && data->out)
{
/* Flush the writes */
if (!g_output_stream_close (data->out, data->cancellable, error))
return FALSE;
g_clear_pointer (&data->out, g_object_unref);
}
if (data->progress)
data->progress (data->downloaded_bytes, data->user_data);
curl_easy_getinfo (session->curl, CURLINFO_RESPONSE_CODE, &response);
data->status = response;
if ((data->flags & FLATPAK_HTTP_FLAGS_NOCHECK_STATUS) == 0 &&
!check_http_status (data->status, error))
return FALSE;
g_info ("Received %" G_GUINT64_FORMAT " bytes", data->downloaded_bytes);
/* This is not really needed, but the auto-pointer confuses some compilers in the CI */
g_clear_pointer (&curl_lock, g_mutex_locker_free);
return TRUE;
}
#endif /* HAVE_CURL */
#if defined(HAVE_SOUP)
/************************************************************************
* Soup implementation *
***********************************************************************/
static gboolean
check_soup_transfer_error (SoupMessage *msg, GError **error)
{
GQuark domain = G_IO_ERROR;
int code;
if (!SOUP_STATUS_IS_TRANSPORT_ERROR (msg->status_code))
return TRUE;
switch (msg->status_code)
{
case SOUP_STATUS_CANCELLED:
code = G_IO_ERROR_CANCELLED;
break;
case SOUP_STATUS_CANT_RESOLVE:
case SOUP_STATUS_CANT_CONNECT:
code = G_IO_ERROR_HOST_NOT_FOUND;
break;
case SOUP_STATUS_IO_ERROR:
code = G_IO_ERROR_CONNECTION_CLOSED;
break;
default:
code = G_IO_ERROR_FAILED;
}
g_set_error (error, domain, code,
"Error connecting to server: %s",
soup_status_get_phrase (msg->status_code));
return FALSE;
}
/* The soup input stream was closed */
static void
stream_closed (GObject *source, GAsyncResult *res, gpointer user_data)
{
LoadUriData *data = user_data;
GInputStream *stream = G_INPUT_STREAM (source);
g_autoptr(GError) error = NULL;
if (!g_input_stream_close_finish (stream, res, &error))
g_warning ("Error closing http stream: %s", error->message);
if (data->out_tmpfile)
{
if (!g_output_stream_close (data->out, data->cancellable, &error))
{
if (data->error == NULL)
g_propagate_error (&data->error, g_steal_pointer (&error));
}
g_clear_pointer (&data->out, g_object_unref);
}
data->done = TRUE;
g_main_context_wakeup (data->context);
}
/* Got some data from the soup input stream */
static void
load_uri_read_cb (GObject *source, GAsyncResult *res, gpointer user_data)
{
LoadUriData *data = user_data;
GInputStream *stream = G_INPUT_STREAM (source);
gssize nread;
nread = g_input_stream_read_finish (stream, res, &data->error);
if (nread == -1 || nread == 0)
{
if (data->progress)
data->progress (data->downloaded_bytes, data->user_data);
g_input_stream_close_async (stream,
G_PRIORITY_DEFAULT, NULL,
stream_closed, data);
return;
}
if (data->out != NULL)
{
gsize n_written;
if (!g_output_stream_write_all (data->out, data->buffer, nread, &n_written,
NULL, &data->error))
{
data->downloaded_bytes += n_written;
g_input_stream_close_async (stream,
G_PRIORITY_DEFAULT, NULL,
stream_closed, data);
return;
}
data->downloaded_bytes += n_written;
}
else
{
g_assert (data->content != NULL);
data->downloaded_bytes += nread;
g_string_append_len (data->content, data->buffer, nread);
}
if (g_get_monotonic_time () - data->last_progress_time > 1 * G_USEC_PER_SEC)
{
if (data->progress)
data->progress (data->downloaded_bytes, data->user_data);
data->last_progress_time = g_get_monotonic_time ();
}
g_input_stream_read_async (stream, data->buffer, sizeof (data->buffer),
G_PRIORITY_DEFAULT, data->cancellable,
load_uri_read_cb, data);
}
/* The http header part of the request is ready */
static void
load_uri_callback (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
SoupRequestHTTP *request = SOUP_REQUEST_HTTP (source_object);
g_autoptr(GInputStream) in = NULL;
LoadUriData *data = user_data;
in = soup_request_send_finish (SOUP_REQUEST (request), res, &data->error);
if (in == NULL)
{
g_main_context_wakeup (data->context);
return;
}
g_autoptr(SoupMessage) msg = soup_request_http_get_message ((SoupRequestHTTP *) request);
if (!check_soup_transfer_error (msg, &data->error))
{
g_main_context_wakeup (data->context);
return;
}
/* We correctly made a connection, although it may be a http failure like 404.
The status and headers are valid on return, even of a http failure though. */
data->status = msg->status_code;
data->hdr_content_type = g_strdup (soup_message_headers_get_content_type (msg->response_headers, NULL));
data->hdr_www_authenticate = g_strdup (soup_message_headers_get_one (msg->response_headers, "WWW-Authenticate"));
data->hdr_etag = g_strdup (soup_message_headers_get_one (msg->response_headers, "ETag"));
data->hdr_last_modified = g_strdup (soup_message_headers_get_one (msg->response_headers, "Last-Modified"));
data->hdr_cache_control = g_strdup (soup_message_headers_get_list (msg->response_headers, "Cache-Control"));
data->hdr_expires = g_strdup (soup_message_headers_get_list (msg->response_headers, "Expires"));
if ((data->flags & FLATPAK_HTTP_FLAGS_NOCHECK_STATUS) == 0 &&
!check_http_status (data->status, &data->error))
{
g_main_context_wakeup (data->context);
return;
}
/* All is good, write the body to the destination */
if (data->out_tmpfile)
{
g_autoptr(GOutputStream) out = NULL;
if (!glnx_open_tmpfile_linkable_at (data->out_tmpfile_parent_dfd, ".",
O_WRONLY, data->out_tmpfile,
&data->error))
{
g_main_context_wakeup (data->context);
return;
}
g_assert (data->out == NULL);
out = g_unix_output_stream_new (data->out_tmpfile->fd, FALSE);
if (data->store_compressed &&
g_strcmp0 (soup_message_headers_get_one (msg->response_headers, "Content-Encoding"), "gzip") != 0)
{
g_autoptr(GZlibCompressor) compressor = g_zlib_compressor_new (G_ZLIB_COMPRESSOR_FORMAT_GZIP, -1);
data->out = g_converter_output_stream_new (out, G_CONVERTER (compressor));
}
else
{
data->out = g_steal_pointer (&out);
}
}
g_input_stream_read_async (in, data->buffer, sizeof (data->buffer),
G_PRIORITY_DEFAULT, data->cancellable,
load_uri_read_cb, data);
}
static SoupSession *
flatpak_create_soup_session (const char *user_agent)
{
SoupSession *soup_session;
const char *http_proxy;
soup_session = soup_session_new_with_options (SOUP_SESSION_USER_AGENT, user_agent,
SOUP_SESSION_SSL_USE_SYSTEM_CA_FILE, TRUE,
SOUP_SESSION_USE_THREAD_CONTEXT, TRUE,
SOUP_SESSION_TIMEOUT, FLATPAK_HTTP_TIMEOUT_SECS,
SOUP_SESSION_IDLE_TIMEOUT, FLATPAK_HTTP_TIMEOUT_SECS,
NULL);
http_proxy = g_getenv ("http_proxy");
if (http_proxy)
{
g_autoptr(SoupURI) proxy_uri = soup_uri_new (http_proxy);
if (!proxy_uri)
g_warning ("Invalid proxy URI '%s'", http_proxy);
else
g_object_set (soup_session, SOUP_SESSION_PROXY_URI, proxy_uri, NULL);
}
if (g_getenv ("OSTREE_DEBUG_HTTP"))
soup_session_add_feature (soup_session, (SoupSessionFeature *) soup_logger_new (SOUP_LOGGER_LOG_BODY, 500));
return soup_session;
}
FlatpakHttpSession *
flatpak_create_http_session (const char *user_agent)
{
return (FlatpakHttpSession *)flatpak_create_soup_session (user_agent);
}
void
flatpak_http_session_free (FlatpakHttpSession* http_session)
{
SoupSession *soup_session = (SoupSession *)http_session;
g_object_unref (soup_session);
}
static gboolean
flatpak_download_http_uri_once (FlatpakHttpSession *http_session,
LoadUriData *data,
const char *uri,
GError **error)
{
SoupSession *soup_session = (SoupSession *)http_session;
g_autoptr(SoupRequestHTTP) request = NULL;
SoupMessage *m;
g_info ("Loading %s using libsoup", uri);
request = soup_session_request_http (soup_session,
(data->flags & FLATPAK_HTTP_FLAGS_HEAD) != 0 ? "HEAD" : "GET",
uri, error);
if (request == NULL)
return FALSE;
m = soup_request_http_get_message (request);
if (data->flags & FLATPAK_HTTP_FLAGS_ACCEPT_OCI)
soup_message_headers_replace (m->request_headers, "Accept",
FLATPAK_OCI_MEDIA_TYPE_IMAGE_MANIFEST ", " FLATPAK_DOCKER_MEDIA_TYPE_IMAGE_MANIFEST2 ", " FLATPAK_OCI_MEDIA_TYPE_IMAGE_INDEX);
if (data->auth)
{
g_autofree char *basic_auth = g_strdup_printf ("Basic %s", data->auth);
soup_message_headers_replace (m->request_headers, "Authorization", basic_auth);
}
if (data->token)
{
g_autofree char *bearer_token = g_strdup_printf ("Bearer %s", data->token);
soup_message_headers_replace (m->request_headers, "Authorization", bearer_token);
}
if (data->cache_data)
{
CacheHttpData *cache_data = data->cache_data;
if (cache_data->etag && cache_data->etag[0])
soup_message_headers_replace (m->request_headers, "If-None-Match", cache_data->etag);
else if (cache_data->last_modified != 0)
{
g_autoptr(GDateTime) date = g_date_time_new_from_unix_utc (cache_data->last_modified);
g_autofree char *date_str = flatpak_format_http_date (date);
soup_message_headers_replace (m->request_headers, "If-Modified-Since", date_str);
}
}
if (data->flags & FLATPAK_HTTP_FLAGS_STORE_COMPRESSED)
{
soup_session_remove_feature_by_type (soup_session, SOUP_TYPE_CONTENT_DECODER);
soup_message_headers_replace (m->request_headers, "Accept-Encoding", "gzip");
data->store_compressed = TRUE;
}
else if (!soup_session_has_feature (soup_session, SOUP_TYPE_CONTENT_DECODER))
{
soup_session_add_feature_by_type (soup_session, SOUP_TYPE_CONTENT_DECODER);
data->store_compressed = FALSE;
}
soup_request_send_async (SOUP_REQUEST (request),
data->cancellable,
load_uri_callback, data);
while (data->error == NULL && !data->done)
g_main_context_iteration (data->context, TRUE);
if (data->error)
{
g_propagate_error (error, g_steal_pointer (&data->error));
return FALSE;
}
g_info ("Received %" G_GUINT64_FORMAT " bytes", data->downloaded_bytes);
return TRUE;
}
#endif /* HAVE_SOUP */
/* Check whether a particular operation should be retried. This is entirely
* based on how it failed (if at all) last time, and whether the operation has
* some retries left. The retry count is set when the operation is first
* created, and must be decremented by the caller. (@n_retries_remaining == 0)
* will always return %FALSE from this function.
*
* This code is copied from libostree's _ostree_fetcher_should_retry_request()
*/
static gboolean
flatpak_http_should_retry_request (const GError *error,
guint n_retries_remaining)
{
if (error == NULL || n_retries_remaining == 0)
return FALSE;
/* Return TRUE for transient errors. */
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_TIMED_OUT) ||
g_error_matches (error, G_IO_ERROR, G_IO_ERROR_HOST_NOT_FOUND) ||
g_error_matches (error, G_IO_ERROR, G_IO_ERROR_HOST_UNREACHABLE) ||
g_error_matches (error, G_IO_ERROR, G_IO_ERROR_PARTIAL_INPUT) ||
g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CONNECTION_CLOSED) ||
g_error_matches (error, G_RESOLVER_ERROR, G_RESOLVER_ERROR_NOT_FOUND) ||
g_error_matches (error, G_RESOLVER_ERROR, G_RESOLVER_ERROR_TEMPORARY_FAILURE))
{
g_info ("Should retry request (remaining: %u retries), due to transient error: %s",
n_retries_remaining, error->message);
return TRUE;
}
return FALSE;
}
GBytes *
flatpak_load_uri_full (FlatpakHttpSession *http_session,
const char *uri,
FlatpakHTTPFlags flags,
const char *auth,
const char *token,
FlatpakLoadUriProgress progress,
gpointer user_data,
int *out_status,
char **out_content_type,
char **out_www_authenticate,
GCancellable *cancellable,
GError **error)
{
g_auto(LoadUriData) data = { NULL };
g_autoptr(GError) local_error = NULL;
guint n_retries_remaining = DEFAULT_N_NETWORK_RETRIES;
g_autoptr(GMainContextPopDefault) main_context = NULL;
gboolean success = FALSE;
/* Ensure we handle file: uris the same independent of backend */
if (g_ascii_strncasecmp (uri, "file:", 5) == 0)
{
g_autoptr(GFile) file = g_file_new_for_uri (uri);
gchar *contents;
gsize len;
if (!g_file_load_contents (file, cancellable, &contents, &len, NULL, error))
return NULL;
return g_bytes_new_take (g_steal_pointer (&contents), len);
}
main_context = flatpak_main_context_new_default ();
data.context = main_context;
data.progress = progress;
data.user_data = user_data;
data.last_progress_time = g_get_monotonic_time ();
data.cancellable = cancellable;
data.flags = flags;
data.auth = auth;
data.token = token;
data.content = g_string_new ("");
do
{
if (n_retries_remaining < DEFAULT_N_NETWORK_RETRIES)
{
g_clear_error (&local_error);
reset_load_uri_data (&data);
}
success = flatpak_download_http_uri_once (http_session, &data, uri, &local_error);
if (success)
break;
g_assert (local_error != NULL);
}
while (flatpak_http_should_retry_request (local_error, n_retries_remaining--));
if (success)
{
if (out_content_type)
*out_content_type = g_steal_pointer (&data.hdr_content_type);
if (out_www_authenticate)
*out_www_authenticate = g_steal_pointer (&data.hdr_www_authenticate);
if (out_status)
*out_status = data.status;