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Christian Grothoff 2019-11-23 22:39:13 +01:00
parent 0ea09d3d6e
commit f5a783c169
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1 changed files with 0 additions and 468 deletions
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src/exchange/taler-exchange-httpd_responses.c
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@ -39,453 +39,6 @@
#define SANITY_CHECKS_ON 1
/**
* Add headers we want to return in every response.
* Useful for testing, like if we want to always close
* connections.
*
* @param response response to modify
*/
void
TEH_RESPONSE_add_global_headers (struct MHD_Response *response)
{
if (TEH_exchange_connection_close)
GNUNET_break (MHD_YES ==
MHD_add_response_header (response,
MHD_HTTP_HEADER_CONNECTION,
"close"));
}
/**
* Is HTTP body deflate compression supported by the client?
*
* @param connection connection to check
* @return #MHD_YES if 'deflate' compression is allowed
*
* Note that right now we're ignoring q-values, which is technically
* not correct, and also do not support "*" anywhere but in a line by
* itself. This should eventually be fixed, see also
* https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
*/
int
TEH_RESPONSE_can_compress (struct MHD_Connection *connection)
{
const char *ae;
const char *de;
ae = MHD_lookup_connection_value (connection,
MHD_HEADER_KIND,
MHD_HTTP_HEADER_ACCEPT_ENCODING);
if (NULL == ae)
return MHD_NO;
if (0 == strcmp (ae,
"*"))
return MHD_YES;
de = strstr (ae,
"deflate");
if (NULL == de)
return MHD_NO;
if ( ( (de == ae) ||
(de[-1] == ',') ||
(de[-1] == ' ') ) &&
( (de[strlen ("deflate")] == '\0') ||
(de[strlen ("deflate")] == ',') ||
(de[strlen ("deflate")] == ';') ) )
return MHD_YES;
return MHD_NO;
}
/**
* Try to compress a response body. Updates @a buf and @a buf_size.
*
* @param[in,out] buf pointer to body to compress
* @param[in,out] buf_size pointer to initial size of @a buf
* @return #MHD_YES if @a buf was compressed
*/
int
TEH_RESPONSE_body_compress (void **buf,
size_t *buf_size)
{
Bytef *cbuf;
uLongf cbuf_size;
int ret;
cbuf_size = compressBound (*buf_size);
cbuf = malloc (cbuf_size);
if (NULL == cbuf)
return MHD_NO;
ret = compress (cbuf,
&cbuf_size,
(const Bytef *) *buf,
*buf_size);
if ( (Z_OK != ret) ||
(cbuf_size >= *buf_size) )
{
/* compression failed */
free (cbuf);
return MHD_NO;
}
free (*buf);
*buf = (void *) cbuf;
*buf_size = (size_t) cbuf_size;
return MHD_YES;
}
/**
* Send JSON object as response.
*
* @param connection the MHD connection
* @param json the json object
* @param response_code the http response code
* @return MHD result code
*/
int
TEH_RESPONSE_reply_json (struct MHD_Connection *connection,
const json_t *json,
unsigned int response_code)
{
struct MHD_Response *resp;
void *json_str;
size_t json_len;
int ret;
int comp;
json_str = json_dumps (json,
JSON_INDENT (2));
if (NULL == json_str)
{
/**
* This log helps to figure out which
* function called this one and assert-failed.
*/
TALER_LOG_ERROR ("Aborting json-packing for HTTP code: %u\n",
response_code);
GNUNET_assert (0);
return MHD_NO;
}
json_len = strlen (json_str);
/* try to compress the body */
comp = MHD_NO;
if (MHD_YES ==
TEH_RESPONSE_can_compress (connection))
comp = TEH_RESPONSE_body_compress (&json_str,
&json_len);
resp = MHD_create_response_from_buffer (json_len,
json_str,
MHD_RESPMEM_MUST_FREE);
if (NULL == resp)
{
free (json_str);
GNUNET_break (0);
return MHD_NO;
}
TEH_RESPONSE_add_global_headers (resp);
GNUNET_break (MHD_YES ==
MHD_add_response_header (resp,
MHD_HTTP_HEADER_CONTENT_TYPE,
"application/json"));
if (MHD_YES == comp)
{
/* Need to indicate to client that body is compressed */
if (MHD_NO ==
MHD_add_response_header (resp,
MHD_HTTP_HEADER_CONTENT_ENCODING,
"deflate"))
{
GNUNET_break (0);
MHD_destroy_response (resp);
return MHD_NO;
}
}
ret = MHD_queue_response (connection,
response_code,
resp);
MHD_destroy_response (resp);
return ret;
}
/**
* Function to call to handle the request by building a JSON
* reply from a format string and varargs.
*
* @param connection the MHD connection to handle
* @param response_code HTTP response code to use
* @param fmt format string for pack
* @param ... varargs
* @return MHD result code
*/
int
TEH_RESPONSE_reply_json_pack (struct MHD_Connection *connection,
unsigned int response_code,
const char *fmt,
...)
{
json_t *json;
va_list argp;
int ret;
json_error_t jerror;
va_start (argp, fmt);
json = json_vpack_ex (&jerror, 0, fmt, argp);
va_end (argp);
if (NULL == json)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
"Failed to pack JSON with format `%s': %s\n",
fmt,
jerror.text);
GNUNET_break (0);
return MHD_NO;
}
ret = TEH_RESPONSE_reply_json (connection,
json,
response_code);
json_decref (json);
return ret;
}
/**
* Send a response indicating an invalid argument.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param param_name the parameter that is invalid
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_arg_invalid (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
const char *param_name)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s, s:I, s:s}",
"error", "invalid parameter",
"code", (json_int_t) ec,
"parameter", param_name);
}
/**
* Send a response indicating an argument refering to a
* resource unknown to the exchange (i.e. unknown reserve or
* denomination key).
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param param_name the parameter that is invalid
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_arg_unknown (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
const char *param_name)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_NOT_FOUND,
"{s:s, s:I, s:s}",
"error", "unknown entity referenced",
"code", (json_int_t) ec,
"parameter", param_name);
}
/**
* Send a response indicating an invalid signature.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param param_name the parameter that is invalid
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_signature_invalid (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
const char *param_name)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_UNAUTHORIZED,
"{s:s, s:I, s:s}",
"error", "invalid signature",
"code", (json_int_t) ec,
"parameter", param_name);
}
/**
* Send a response indicating a missing argument.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param param_name the parameter that is missing
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_arg_missing (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
const char *param_name)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s, s:I, s:s}",
"error", "missing parameter",
"code", (json_int_t) ec,
"parameter", param_name);
}
/**
* Send a response indicating an internal error.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param hint hint about the internal error's nature
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_internal_error (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
const char *hint)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
"{s:s, s:I, s:s}",
"error", "internal error",
"code", (json_int_t) ec,
"hint", hint);
}
/**
* Send a response indicating an error.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param http_status HTTP status code to use
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_with_error (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
unsigned int http_status)
{
return TEH_RESPONSE_reply_json_pack (connection,
http_status,
"{s:I}",
"code", (json_int_t) ec);
}
/**
* Send a response indicating an external error.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @param hint hint about the error's nature
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_external_error (struct MHD_Connection *connection,
enum TALER_ErrorCode ec,
const char *hint)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s, s:I, s:s}",
"error", "client error",
"code", (json_int_t) ec,
"hint", hint);
}
/**
* Send a response indicating an error committing a
* transaction (concurrent interference).
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_commit_error (struct MHD_Connection *connection,
enum TALER_ErrorCode ec)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
"{s:s, s:I}",
"error", "commit failure",
"code", (json_int_t) ec);
}
/**
* Send a response indicating a failure to talk to the Exchange's
* database.
*
* @param connection the MHD connection to use
* @param ec error code uniquely identifying the error
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_internal_db_error (struct MHD_Connection *connection,
enum TALER_ErrorCode ec)
{
return TEH_RESPONSE_reply_internal_error (connection,
ec,
"Failure in database interaction");
}
/**
* Send a response indicating that the request was too big.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_request_too_large (struct MHD_Connection *connection)
{
struct MHD_Response *resp;
int ret;
resp = MHD_create_response_from_buffer (0,
NULL,
MHD_RESPMEM_PERSISTENT);
if (NULL == resp)
return MHD_NO;
TEH_RESPONSE_add_global_headers (resp);
ret = MHD_queue_response (connection,
MHD_HTTP_REQUEST_ENTITY_TOO_LARGE,
resp);
MHD_destroy_response (resp);
return ret;
}
/**
* Send a response indicating that the JSON was malformed.
*
* @param connection the MHD connection to use
* @return a MHD result code
*/
int
TEH_RESPONSE_reply_invalid_json (struct MHD_Connection *connection)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_BAD_REQUEST,
"{s:s, s:I}",
"error", "invalid json",
"code",
(json_int_t) TALER_EC_JSON_INVALID);
}
/**
* Compile the transaction history of a coin into a JSON object.
*
@ -1172,25 +725,4 @@ TEH_RESPONSE_compile_reserve_history (const struct
}
/**
* A merchant asked for details about a deposit, but
* we do not know anything about the deposit. Generate the
* 404 reply.
*
* @param connection connection to the client
* @param ec Taler error code
* @return MHD result code
*/
int
TEH_RESPONSE_reply_transaction_unknown (struct MHD_Connection *connection,
enum TALER_ErrorCode ec)
{
return TEH_RESPONSE_reply_json_pack (connection,
MHD_HTTP_NOT_FOUND,
"{s:s, s:I}",
"error", "Deposit unknown",
"code", (json_int_t) ec);
}
/* end of taler-exchange-httpd_responses.c */