Top |
Functions
Properties
gchar * | address | Read |
gboolean | enable-logging | Read / Write |
gboolean | enable-online | Read / Write |
guint | port | Read |
UhmResolver * | resolver | Read |
GTlsCertificate * | tls-certificate | Read / Write |
GFile * | trace-directory | Read / Write |
Description
This is a mock HTTPS server which can be used to run unit tests of network client code on a loopback interface rather than on the real Internet. At its core, it's a simple HTTPS server which runs on a loopback address on an arbitrary port. The code under test must be modified to send its requests to this port, although UhmResolver may be used to transparently redirect all IP addresses to the mock server. A convenience layer on the mock server provides loading of and recording to trace files, which are sequences of request–response HTTPS message pairs where each request is expected by the server (in order). On receiving an expected request, the mock server will return the relevant response and move to expecting the next request in the trace file.
The mock server currently only operates on a single network interface, on HTTPS only. This may change in future. A dummy TLS certificate is used
to authenticate the server. This certificate is not signed by a CA, so the “ssl-strict” property must be set to FALSE
in client code
during (and only during!) testing.
The server can operate in three modes: logging, testing, and comparing. These are set by “enable-logging” and “enable-online”.
• Logging mode (“enable-logging”: TRUE
, “enable-online”: TRUE
): Requests are sent to the real server online, and the
request–response pairs recorded to a log file.
• Testing mode (“enable-logging”: FALSE
, “enable-online”: FALSE
): Requests are sent to the mock server, which responds
from the trace file.
• Comparing mode (“enable-logging”: FALSE
, “enable-online”: TRUE
): Requests are sent to the real server online, and
the request–response pairs are compared against those in an existing log file to see if the log file is up-to-date.
Functions
uhm_server_new ()
UhmServer *
uhm_server_new (void
);
Creates a new UhmServer with default properties.
Since: 0.1.0
uhm_server_run ()
void
uhm_server_run (UhmServer *self
);
Runs the mock server, binding to a loopback TCP/IP interface and preparing a HTTPS server which is ready to accept requests. The TCP/IP address and port number are chosen randomly out of the loopback addresses, and are exposed as “address” and “port” once this function has returned. A UhmResolver (exposed as “resolver”) is set as the default GResolver while the server is running.
The server is started in a worker thread, so this function returns immediately and the server continues to run in the background. Use uhm_server_stop()
to shut it down.
This function always succeeds.
Since: 0.1.0
uhm_server_stop ()
void
uhm_server_stop (UhmServer *self
);
Stops a mock server started by calling uhm_server_run()
. This shuts down the server's worker thread and unbinds it from its TCP/IP socket.
This unloads any trace file loaded by calling uhm_server_load_trace()
(or its asynchronous counterpart). It also resets the set of domain
names loaded into the “resolver”.
This function always succeeds.
Since: 0.1.0
uhm_server_start_trace ()
void uhm_server_start_trace (UhmServer *self
,const gchar *trace_name
,GError **error
);
Starts a mock server which follows the trace file of filename trace_name
in the “trace-directory” directory.
See uhm_server_start_trace_full()
for further documentation.
This function has undefined behaviour if “trace-directory” is NULL
.
On failure, error
will be set and the UhmServer state will remain unchanged. See uhm_server_start_trace_full()
for
details of the error domains used.
Since: 0.1.0
uhm_server_start_trace_full ()
void uhm_server_start_trace_full (UhmServer *self
,GFile *trace_file
,GError **error
);
Convenience function to start logging to or reading from the given trace_file
, depending on the values of “enable-logging” and
“enable-online”.
If “enable-logging” is TRUE
, a log handler will be set up to redirect all client network activity into the given trace_file
.
If trace_file
already exists, it will be overwritten.
If “enable-online” is FALSE
, the given trace_file
is loaded using uhm_server_load_trace()
and then a mock server is
started using uhm_server_run()
.
On failure, error
will be set and the UhmServer state will remain unchanged. A GIOError will be set if logging is enabled
(“enable-logging”) and there is a problem writing to the trace file; or if a trace needs to be loaded and there is a problem
reading from the trace file.
Since: 0.1.0
uhm_server_end_trace ()
void
uhm_server_end_trace (UhmServer *self
);
Convenience function to finish logging to or reading from a trace file previously passed to uhm_server_start_trace()
or
uhm_server_start_trace_full()
.
If “enable-online” is FALSE
, this will shut down the mock server (as if uhm_server_stop()
had been called).
Since: 0.1.0
uhm_server_load_trace ()
void uhm_server_load_trace (UhmServer *self
,GFile *trace_file
,GCancellable *cancellable
,GError **error
);
Synchronously loads the given trace_file
of network messages, ready to simulate a network conversation by matching
requests against the file and returning the associated responses. Call uhm_server_run()
to start the mock
server afterwards.
Loading the trace file may be cancelled from another thread using cancellable
.
On error, error
will be set and the state of the UhmServer will not change. A GIOError will be set if there is
a problem reading the trace file.
Parameters
self |
||
trace_file |
trace file to load |
|
cancellable |
a GCancellable, or |
[allow-none] |
error |
[allow-none] |
Since: 0.1.0
uhm_server_load_trace_async ()
void uhm_server_load_trace_async (UhmServer *self
,GFile *trace_file
,GCancellable *cancellable
,GAsyncReadyCallback callback
,gpointer user_data
);
Asynchronous version of uhm_server_load_trace()
. In callback
, call uhm_server_load_trace_finish()
to complete the operation.
Parameters
self |
||
trace_file |
trace file to load |
|
cancellable |
a GCancellable, or |
[allow-none] |
callback |
function to call once the async operation is complete |
|
user_data |
user data to pass to |
[allow-none] |
Since: 0.1.0
uhm_server_load_trace_finish ()
void uhm_server_load_trace_finish (UhmServer *self
,GAsyncResult *result
,GError **error
);
Finishes an asynchronous operation started by uhm_server_load_trace_async()
.
On error, error
will be set and the state of the UhmServer will not change.
See uhm_server_load_trace()
for details on the error domains used.
Since: 0.1.0
uhm_server_unload_trace ()
void
uhm_server_unload_trace (UhmServer *self
);
Unloads the current trace file of network messages, as loaded by uhm_server_load_trace()
or uhm_server_load_trace_async()
.
Since: 0.1.0
uhm_server_filter_ignore_parameter_values ()
gulong uhm_server_filter_ignore_parameter_values (UhmServer *self
,const gchar * const *parameter_names
);
Install a “compare-messages” filter function which will override the
default comparison function to one which ignores differences in the values of
the given query parameter_names
. The named parameters must still be present
in the query, however.
The filter will remain in place for the lifetime of the UhmServer, until
is called with the returned
filter ID.uhm_server_compare_messages_remove_filter()
Note that currently only one of the installed comparison functions will be used. This may change in future.
Returns
opaque filter ID used with
uhm_server_compare_messages_remove_filter()
to remove the filter later
Since: 0.5.0
uhm_server_compare_messages_remove_filter ()
void uhm_server_compare_messages_remove_filter (UhmServer *self
,gulong filter_id
);
Remove a “compare-messages” filter function installed previously by
calling something like uhm_server_filter_ignore_parameter_values()
.
It is an error to call this function with an invalid filter_id
.
Since: 0.5.0
uhm_server_received_message_chunk ()
void uhm_server_received_message_chunk (UhmServer *self
,const gchar *message_chunk
,goffset message_chunk_length
,GError **error
);
Indicates to the mock server that a single new line of a message was received from the real server. The message line may be
appended to the current trace file if logging is enabled (“enable-logging” is TRUE
), adding a newline character
at the end. If logging is disabled but online mode is enabled (“enable-online” is TRUE
), the message line will
be compared to the next expected line in the existing trace file. Otherwise, this function is a no-op.
On failure, error
will be set and the UhmServer state will remain unchanged apart from the parse state machine, which will remain
in the state reached after parsing message_chunk
. A G_IO_ERROR
will be returned if writing to the trace file failed. If in
comparison mode and the received message chunk corresponds to an unexpected message in the trace file, a UHM_SERVER_ERROR
will
be returned.
In common cases where message log data only needs to be passed to a UhmServer and not (for example) logged to an
application-specific file or the command line as well, it is simpler to use uhm_server_received_message_chunk_from_soup()
, passing
it directly to soup_logger_set_printer()
. See the documentation for uhm_server_received_message_chunk_from_soup()
for details.
Since: 0.1.0
uhm_server_received_message_chunk_with_direction ()
void uhm_server_received_message_chunk_with_direction (UhmServer *self
,char direction
,const gchar *data
,goffset data_length
,GError **error
);
Convenience version of uhm_server_received_message_chunk()
which takes the
message direction
and data
separately, as provided by libsoup in a
SoupLoggerPrinter callback.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 |
UhmServer *mock_server; SoupSession *session; SoupLogger *logger; static void soup_log_printer (SoupLogger *logger, SoupLoggerLogLevel level, char direction, const char *data, gpointer user_data) { /* Pass the data to libuhttpmock. */ UhmServer *mock_server = UHM_SERVER (user_data); uhm_server_received_message_chunk_with_direction (mock_server, direction, data, strlen (data), NULL); } mock_server = uhm_server_new (); session = soup_session_new (); logger = soup_logger_new (SOUP_LOGGER_LOG_BODY, -1); soup_logger_set_printer (logger, (SoupLoggerPrinter) soup_log_printer, g_object_ref (mock_server), g_object_unref); soup_session_add_feature (session, SOUP_SESSION_FEATURE (logger)); g_object_unref (logger); /* Do something with mock_server here. */ |
Since: 0.3.0
uhm_server_received_message_chunk_from_soup ()
void uhm_server_received_message_chunk_from_soup (SoupLogger *logger
,SoupLoggerLogLevel level
,char direction
,const char *data
,gpointer user_data
);
Convenience version of uhm_server_received_message_chunk()
which can be passed directly to soup_logger_set_printer()
to forward all libsoup traffic logging to a UhmServer. The UhmServer must be passed to soup_logger_set_printer()
as
its user data.
1 2 3 4 5 6 7 8 9 10 11 12 13 |
UhmServer *mock_server; SoupSession *session; SoupLogger *logger; mock_server = uhm_server_new (); session = soup_session_new (); logger = soup_logger_new (SOUP_LOGGER_LOG_BODY, -1); soup_logger_set_printer (logger, uhm_server_received_message_chunk_from_soup, g_object_ref (mock_server), g_object_unref); soup_session_add_feature (session, SOUP_SESSION_FEATURE (logger)); g_object_unref (logger); /* Do something with mock_server here. */ |
Parameters
logger |
a SoupLogger |
|
level |
the detail level of this log message |
|
direction |
the transmission direction of the message |
|
data |
message data |
|
user_data |
user data passed to the SoupLogger, or |
[allow-none] |
Since: 0.3.0
uhm_server_get_enable_logging ()
gboolean
uhm_server_get_enable_logging (UhmServer *self
);
Gets the value of the “enable-logging” property.
Since: 0.1.0
uhm_server_set_enable_logging ()
void uhm_server_set_enable_logging (UhmServer *self
,gboolean enable_logging
);
Sets the value of the “enable-logging” property.
Since: 0.1.0
uhm_server_get_enable_online ()
gboolean
uhm_server_get_enable_online (UhmServer *self
);
Gets the value of the “enable-online” property.
Returns
TRUE
if the server does not intercept and handle network connections from client code; FALSE
otherwise
Since: 0.1.0
uhm_server_set_enable_online ()
void uhm_server_set_enable_online (UhmServer *self
,gboolean enable_online
);
Sets the value of the “enable-online” property.
Since: 0.1.0
uhm_server_get_trace_directory ()
GFile *
uhm_server_get_trace_directory (UhmServer *self
);
Gets the value of the “trace-directory” property.
Since: 0.1.0
uhm_server_set_trace_directory ()
void uhm_server_set_trace_directory (UhmServer *self
,GFile *trace_directory
);
Sets the value of the “trace-directory” property.
Since: 0.1.0
uhm_server_get_tls_certificate ()
GTlsCertificate *
uhm_server_get_tls_certificate (UhmServer *self
);
Gets the value of the “tls-certificate” property.
Returns
the server's current TLS certificate; or NULL
if it's serving HTTP only.
[transfer none][allow-none]
Since: 0.1.0
uhm_server_set_tls_certificate ()
void uhm_server_set_tls_certificate (UhmServer *self
,GTlsCertificate *tls_certificate
);
Sets the value of the “tls-certificate” property.
Since: 0.1.0
uhm_server_set_default_tls_certificate ()
GTlsCertificate *
uhm_server_set_default_tls_certificate
(UhmServer *self
);
Sets the value of the “tls-certificate” property to the default TLS certificate built in to libuhttpmock.
This default certificate is not signed by any certificate authority, and contains minimal metadata details. It may
be used by clients which have no special certificate requirements; clients which have special requirements should
construct a custom GTlsCertificate and pass it to uhm_server_set_tls_certificate()
.
Since: 0.1.0
uhm_server_set_expected_domain_names ()
void uhm_server_set_expected_domain_names (UhmServer *self
,const gchar * const *domain_names
);
Set the domain names which are expected to have requests made of them by the client code interacting with this UhmServer.
This is a convenience method which calls uhm_resolver_add_A()
on the server’s UhmResolver for each of the domain names
listed in domain_names
. It associates them with the server’s current IP address, and automatically updates the mappings
if the IP address or resolver change.
Note that this will reset all records on the server’s UhmResolver, replacing all of them with the provided domain_names
.
It is safe to add further domain names to the UhmResolver in a callback for the “notify” signal for “resolver”;
that signal is emitted after the resolver is cleared and these domain_names
are added.
Since: 0.3.0
uhm_server_get_address ()
const gchar *
uhm_server_get_address (UhmServer *self
);
Gets the value of the “address” property.
Returns
the physical address of the listening socket the server is currently bound to; or NULL
if the server is not running.
[allow-none][transfer none]
Since: 0.1.0
uhm_server_get_port ()
guint
uhm_server_get_port (UhmServer *self
);
Gets the value of the “port” property.
Returns
the port of the listening socket the server is currently bound to; or 0
if the server is not running
Since: 0.1.0
uhm_server_get_resolver ()
UhmResolver *
uhm_server_get_resolver (UhmServer *self
);
Gets the value of the “resolver” property.
Returns
the mock resolver in use by the mock server, or NULL
if no resolver is active.
[allow-none][transfer none]
Since: 0.1.0
Types and Values
UhmServer
typedef struct _UhmServer UhmServer;
All the fields in the UhmServer structure are private and should never be accessed directly.
Since: 0.1.0
UhmServerClass
typedef struct { gboolean (*handle_message) (UhmServer *self, SoupMessage *message, SoupClientContext *client); gboolean (*compare_messages) (UhmServer *self, SoupMessage *expected_message, SoupMessage *actual_message, SoupClientContext *actual_client); } UhmServerClass;
Most of the fields in the UhmServerClass structure are private and should never be accessed directly.
Members
Class handler for the “handle-message” signal. Subclasses may implement this to override the
default handler for the signal. The default handler should always return |
||
Class handler for the “compare-messages” signal. Subclasses may implement this to override
the default handler for the signal. The handler should return |
Since: 0.1.0
Property Details
The “address”
property
“address” gchar *
Address of the local mock server if it's running, or NULL
otherwise. This will be non-NULL
between calls to uhm_server_run()
and
uhm_server_stop()
. The address is a physical IP address, e.g. 127.0.0.1
.
This should not normally need to be passed into client code under test, unless the code references IP addresses specifically. The mock server runs a DNS resolver which automatically redirects client requests for known domain names to this address (“resolver”).
Flags: Read
Default value: NULL
Since: 0.1.0
The “enable-logging”
property
“enable-logging” gboolean
TRUE
if network traffic should be logged to a trace file (specified by calling uhm_server_start_trace()
). This operates independently
of whether traffic is online or being handled locally by the mock server.
Use this in conjunction with “enable-online” to either log online traffic, or replay logged traffic locally.
Flags: Read / Write
Default value: FALSE
Since: 0.1.0
The “enable-online”
property
“enable-online” gboolean
TRUE
if network traffic should reach the Internet as normal; FALSE
to redirect it to the local mock server.
Use this in conjunction with “enable-logging” to either log online traffic, or replay logged traffic locally.
Flags: Read / Write
Default value: FALSE
Since: 0.1.0
The “port”
property
“port” guint
Port of the local mock server if it's running, or 0
otherwise. This will be non-0
between
calls to uhm_server_run()
and uhm_server_stop()
.
It is intended that this port be passed into the client code under test, to substitute for the default HTTPS port (443) which it would otherwise use.
Flags: Read
Default value: 0
Since: 0.1.0
The “resolver”
property
“resolver” UhmResolver *
Mock resolver used to redirect HTTP requests from specified domain names to the local mock server instance. This will always be set while the
server is running (between calls to uhm_server_run()
and uhm_server_stop()
), and is NULL
otherwise.
Use the resolver specified in this property to add domain names which are expected to be requested by the current trace. Domain names not added
to the resolver will be rejected by the mock server. The set of domain names in the resolver will be reset when uhm_server_stop()
is
called.
Flags: Read
Since: 0.1.0
The “tls-certificate”
property
“tls-certificate” GTlsCertificate *
TLS certificate for the mock server to use when serving HTTPS pages. If this is non-NULL
, the server will always use HTTPS. If it is NULL
,
the server will always use HTTP. The TLS certificate may be changed after constructing the UhmServer, but changes to the property will not
take effect until the next call to uhm_server_run()
.
A certificate and private key may be generated by executing:
openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -nodes
. These files may then be used to construct a
GTlsCertificate by calling g_tls_certificate_new_from_files()
.
Alternatively, a default GTlsCertificate which wraps a dummy certificate (not signed by any certificate authority) may be set by
calling uhm_server_set_default_tls_certificate()
. This may be used as the “tls-certificate” if the code under test has no specific
requirements of the certificate used by the mock server it's tested against.
Flags: Read / Write
Since: 0.1.0
The “trace-directory”
property
“trace-directory” GFile *
Directory relative to which all trace files specified in calls to uhm_server_start_trace()
will be resolved.
This is not used for any other methods, but must be non-NULL
if uhm_server_start_trace()
is called.
Flags: Read / Write
Since: 0.1.0
Signal Details
The “compare-messages”
signal
gboolean user_function (UhmServer *self, SoupMessage *expected_message, SoupMessage *actual_message, SoupClientContext *actual_client, gpointer user_data)
Emitted whenever the mock server must compare two SoupMessages for equality; e.g. when in the testing or comparison modes. Test code may connect to this signal and implement a handler which checks custom properties of the messages. The default handler compares the URI and method of the messages, but no headers and not the message bodies.
Signal handlers should return TRUE
if the messages match; and FALSE
otherwise. The first signal handler executed when
this signal is emitted wins.
Parameters
self |
||
expected_message |
a message containing the expected HTTP(S) message provided by “handle-message” |
|
actual_message |
a message containing the incoming HTTP(S) request |
|
actual_client |
additional data about the HTTP client making the request |
|
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 0.1.0
The “handle-message”
signal
gboolean user_function (UhmServer *self, SoupMessage *message, SoupClientContext *client, gpointer user_data)
Emitted whenever the mock server is running and receives a request from a client. Test code may connect to this signal and implement a handler which builds and returns a suitable response for a given message. The default handler reads a request–response pair from the current trace file, matches the requests and then returns the given response. If the requests don't match, an error is raised.
Signal handlers should return TRUE
if they have handled the request and set an appropriate response; and FALSE
otherwise.
Parameters
self |
||
message |
a message containing the incoming HTTP(S) request, and which the outgoing HTTP(S) response should be set on |
|
client |
additional data about the HTTP client making the request |
|
user_data |
user data set when the signal handler was connected. |
Flags: Run Last
Since: 0.1.0