/*
This file is part of TALER
Copyright (C) 2014-2019 Taler Systems SA
TALER 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,
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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with TALER; see the file COPYING.LGPL. If not,
see
*/
/**
* @file lib/sync_api_upload.c
* @brief Implementation of the upload POST
* @author Christian Grothoff
*/
#include "platform.h"
#include
#include
#include /* just for HTTP status codes */
#include
#include
#include
#include
#include "sync_service.h"
#include "sync_api_curl_defaults.h"
/**
* @brief Handle for an upload operation.
*/
struct SYNC_UploadOperation
{
/**
* The url for this request.
*/
char *url;
/**
* Handle for the request.
*/
struct GNUNET_CURL_Job *job;
/**
* Reference to the execution context.
*/
struct GNUNET_CURL_Context *ctx;
/**
* Function to call with the result.
*/
SYNC_UploadCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
/**
* Payment URI we received from the service, or NULL.
*/
char *pay_uri;
/**
* Hash of the data we are uploading.
*/
struct GNUNET_HashCode new_upload_hash;
};
/**
* Function called when we're done processing the
* HTTP /backup request.
*
* @param cls the `struct SYNC_UploadOperation`
* @param response_code HTTP response code, 0 on error
* @param response
*/
static void
handle_upload_finished (void *cls,
long response_code,
const void *data,
size_t data_size)
{
struct SYNC_UploadOperation *uo = cls;
enum TALER_ErrorCode ec = TALER_EC_INVALID;
struct SYNC_UploadDetails ud;
struct SYNC_UploadDetails *udp;
uo->job = NULL;
udp = NULL;
memset (&ud, 0, sizeof (ud));
switch (response_code)
{
case 0:
break;
case MHD_HTTP_NO_CONTENT:
ud.us = SYNC_US_SUCCESS;
ud.details.curr_backup_hash = &uo->new_upload_hash;
udp = &ud;
ec = TALER_EC_NONE;
break;
case MHD_HTTP_NOT_MODIFIED:
ud.us = SYNC_US_SUCCESS;
ud.details.curr_backup_hash = &uo->new_upload_hash;
udp = &ud;
ec = TALER_EC_NONE;
break;
case MHD_HTTP_BAD_REQUEST:
GNUNET_break (0);
ec = TALER_JSON_get_error_code2 (data,
data_size);
break;
case MHD_HTTP_PAYMENT_REQUIRED:
ud.us = SYNC_US_PAYMENT_REQUIRED;
ud.details.payment_request = uo->pay_uri;
udp = &ud;
ec = TALER_EC_NONE;
break;
case MHD_HTTP_FORBIDDEN:
GNUNET_break (0);
ec = TALER_JSON_get_error_code2 (data,
data_size);
break;
case MHD_HTTP_CONFLICT:
ud.us = SYNC_US_CONFLICTING_BACKUP;
GNUNET_CRYPTO_hash (data,
data_size,
&ud.details.recovered_backup.existing_backup_hash);
ud.details.recovered_backup.existing_backup_size
= data_size;
ud.details.recovered_backup.existing_backup
= data;
udp = &ud;
ec = TALER_EC_NONE;
break;
case MHD_HTTP_GONE:
ec = TALER_JSON_get_error_code2 (data,
data_size);
break;
case MHD_HTTP_LENGTH_REQUIRED:
GNUNET_break (0);
break;
case MHD_HTTP_REQUEST_ENTITY_TOO_LARGE:
ec = TALER_JSON_get_error_code2 (data,
data_size);
break;
case MHD_HTTP_TOO_MANY_REQUESTS:
ec = TALER_JSON_get_error_code2 (data,
data_size);
break;
case MHD_HTTP_INTERNAL_SERVER_ERROR:
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
"Internal server error: `%.*s\n",
(int) data_size,
(const char *) data);
break;
}
if (NULL != uo->cb)
{
uo->cb (uo->cb_cls,
ec,
response_code,
udp);
uo->cb = NULL;
}
SYNC_upload_cancel (uo);
}
/**
* Handle HTTP header received by curl.
*
* @param buffer one line of HTTP header data
* @param size size of an item
* @param nitems number of items passed
* @param userdata our `struct SYNC_DownloadOperation *`
* @return `size * nitems`
*/
static size_t
handle_header (char *buffer,
size_t size,
size_t nitems,
void *userdata)
{
struct SYNC_UploadOperation *uo = userdata;
size_t total = size * nitems;
char *ndup;
const char *hdr_type;
char *hdr_val;
char *sp;
ndup = GNUNET_strndup (buffer,
total);
hdr_type = strtok_r (ndup,
":",
&sp);
if (NULL == hdr_type)
{
GNUNET_free (ndup);
return total;
}
hdr_val = strtok_r (NULL,
"",
&sp);
if (NULL == hdr_val)
{
GNUNET_free (ndup);
return total;
}
if (' ' == *hdr_val)
hdr_val++;
if (0 == strcasecmp (hdr_type,
"Taler"))
{
size_t len;
/* found payment URI we care about! */
uo->pay_uri = GNUNET_strdup (hdr_val);
len = strlen (uo->pay_uri);
while ( (len > 0) &&
( ('\n' == uo->pay_uri[len - 1]) ||
('\r' == uo->pay_uri[len - 1]) ) )
{
len--;
uo->pay_uri[len] = '\0';
}
}
GNUNET_free (ndup);
return total;
}
struct SYNC_UploadOperation *
SYNC_upload (struct GNUNET_CURL_Context *ctx,
const char *base_url,
struct SYNC_AccountPrivateKeyP *priv,
const struct GNUNET_HashCode *prev_backup_hash,
size_t backup_size,
const void *backup,
enum SYNC_PaymentOptions po,
const char *paid_order_id,
SYNC_UploadCallback cb,
void *cb_cls)
{
struct SYNC_AccountSignatureP account_sig;
struct SYNC_UploadOperation *uo;
CURL *eh;
struct curl_slist *job_headers;
struct SYNC_UploadSignaturePS usp = {
.purpose.purpose = htonl (TALER_SIGNATURE_SYNC_BACKUP_UPLOAD),
.purpose.size = htonl (sizeof (usp))
};
if (NULL != prev_backup_hash)
usp.old_backup_hash = *prev_backup_hash;
GNUNET_CRYPTO_hash (backup,
backup_size,
&usp.new_backup_hash);
GNUNET_CRYPTO_eddsa_sign (&priv->eddsa_priv,
&usp,
&account_sig.eddsa_sig);
/* setup our HTTP headers */
job_headers = NULL;
{
struct curl_slist *ext;
char *val;
char *hdr;
/* Set Sync-Signature header */
val = GNUNET_STRINGS_data_to_string_alloc (&account_sig,
sizeof (account_sig));
GNUNET_asprintf (&hdr,
"Sync-Signature: %s",
val);
GNUNET_free (val);
ext = curl_slist_append (job_headers,
hdr);
GNUNET_free (hdr);
if (NULL == ext)
{
GNUNET_break (0);
curl_slist_free_all (job_headers);
return NULL;
}
job_headers = ext;
/* set If-None-Match header */
val = GNUNET_STRINGS_data_to_string_alloc (&usp.new_backup_hash,
sizeof (struct GNUNET_HashCode));
GNUNET_asprintf (&hdr,
"%s: %s",
MHD_HTTP_HEADER_IF_NONE_MATCH,
val);
GNUNET_free (val);
ext = curl_slist_append (job_headers,
hdr);
GNUNET_free (hdr);
if (NULL == ext)
{
GNUNET_break (0);
curl_slist_free_all (job_headers);
return NULL;
}
job_headers = ext;
/* Setup If-Match header */
if (NULL != prev_backup_hash)
{
val = GNUNET_STRINGS_data_to_string_alloc (&usp.old_backup_hash,
sizeof (struct
GNUNET_HashCode));
GNUNET_asprintf (&hdr,
"If-Match: %s",
val);
GNUNET_free (val);
ext = curl_slist_append (job_headers,
hdr);
GNUNET_free (hdr);
if (NULL == ext)
{
GNUNET_break (0);
curl_slist_free_all (job_headers);
return NULL;
}
job_headers = ext;
}
}
/* Finished setting up headers */
uo = GNUNET_new (struct SYNC_UploadOperation);
uo->new_upload_hash = usp.new_backup_hash;
{
char *path;
char *account_s;
struct SYNC_AccountPublicKeyP pub;
GNUNET_CRYPTO_eddsa_key_get_public (&priv->eddsa_priv,
&pub.eddsa_pub);
account_s = GNUNET_STRINGS_data_to_string_alloc (&pub,
sizeof (pub));
GNUNET_asprintf (&path,
"backups/%s",
account_s);
GNUNET_free (account_s);
if (0 != (po & SYNC_PO_FRESH_ORDER))
{
uo->url = (0 != (po & SYNC_PO_FORCE_PAYMENT))
? TALER_url_join (base_url,
path,
"fresh",
"y",
"pay",
"y",
(NULL != paid_order_id)
? "paying"
: NULL,
paid_order_id,
NULL)
: TALER_url_join (base_url,
path,
"fresh",
"y",
(NULL != paid_order_id)
? "paying"
: NULL,
paid_order_id,
NULL);
}
else
{
uo->url = (0 != (po & SYNC_PO_FORCE_PAYMENT))
? TALER_url_join (base_url,
path,
"pay",
"y",
(NULL != paid_order_id)
? "paying"
: NULL,
paid_order_id,
NULL)
: TALER_url_join (base_url,
path,
(NULL != paid_order_id)
? "paying"
: NULL,
paid_order_id,
NULL);
}
GNUNET_free (path);
}
uo->ctx = ctx;
uo->cb = cb;
uo->cb_cls = cb_cls;
eh = SYNC_curl_easy_get_ (uo->url);
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_POSTFIELDS,
backup));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_POSTFIELDSIZE,
(long) backup_size));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_HEADERFUNCTION,
&handle_header));
GNUNET_assert (CURLE_OK ==
curl_easy_setopt (eh,
CURLOPT_HEADERDATA,
uo));
uo->job = GNUNET_CURL_job_add_raw (ctx,
eh,
job_headers,
&handle_upload_finished,
uo);
curl_slist_free_all (job_headers);
return uo;
}
/**
* Cancel the upload. Note that aborting an upload does NOT guarantee
* that it did not complete, it is possible that the server did
* receive the full request before the upload is aborted.
*
* @param uo operation to cancel.
*/
void
SYNC_upload_cancel (struct SYNC_UploadOperation *uo)
{
if (NULL != uo->job)
{
GNUNET_CURL_job_cancel (uo->job);
uo->job = NULL;
}
GNUNET_free (uo->pay_uri);
GNUNET_free (uo->url);
GNUNET_free (uo);
}
/* end of sync_api_upload.c */