14.22. taler-exchange-httpd(1)
14.22.1. Name
taler-exchange-httpd - run Taler exchange (with RESTful API)
14.22.2. Synopsis
taler-exchange-httpd
[-a | –allow-timetravel]
[-C | –connection-close]
[-c FILENAME | –config=FILENAME]
[-f FILENAME | –file-input=FILENAME]
[-h | –help]
[-L LOGLEVEL | –loglevel=LOGLEVEL]
[-l FILENAME | –logfile=FILENAME]
[-n N | –num-threads=N]
[-r**|–allow-reuse-address**]
[-T USEC | –timetravel=USEC]
[-t SECONDS | –timeout=SECONDS]
[-v | –version]
14.22.3. Description
taler-exchange-httpd is a command-line tool to run the Taler
exchange (HTTP server). The required configuration, keys and database
must exist before running this command.
Its options are as follows:
- -a | –allow-timetravel
- Allow clients to request /keys for arbitrary timestamps.
This should only be enabled for testing and development,
as clients could abuse this in denial of service attacks,
as it makes the /keys response generation much more expensive.
- -C | –connection-close
- Force each HTTP connection to be closed after each request (useful in
combination with -f to avoid having to wait for
netcat (nc) to time out).
- -c FILENAME | –config=FILENAME
- Use the configuration and other resources for the merchant to operate
from FILENAME.
- -f FILENAME | –file-input=FILENAME
This option is only available if the exchange was compiled with the
configure option –enable-developer-mode. It is used for generating
test cases against the exchange using AFL. When this option is
present, the HTTP server will
- terminate after the first client’s HTTP connection is completed,
and
- automatically start such a client using a helper process based on
the nc(1) or ncat(1) binary using FILENAME as the standard input
to the helper process.
As a result, the process will effectively run with FILENAME as the
input from an HTTP client and then immediately exit. This is useful
to test taler-exchange-httpd against many different possible inputs
in a controlled way.
- -h | –help
- Print short help on options.
- -L LOGLEVEL | –loglevel=LOGLEVEL
- Specifies the log level to use. Accepted values are:
DEBUG, INFO,
WARNING, ERROR.
- -l FILENAME | –logfile=FILENAME
- Send logging output to FILENAME.
- -r | –allow-reuse-address
- Allow the exchange to re-use the listen port even if another service
is already using it. Useful if multiple processes are used to increase
processing capacity.
- -T USEC | –timetravel=USEC
- Modify the system time by USEC microseconds.
USEC may be prefixed with
+ or - (e.g. -T +300).
This option is intended for debugging/testing only.
- -t SECONDS | –timeout=SECONDS
- Specifies the number of SECONDS after which the HTTPD should close
(idle) HTTP connections.
- -v | –version
- Print version information.
14.22.4. Signals
taler-exchange-httpd responds to the following signals:
SIGTERM- Sending a SIGTERM to the process will cause it to shutdown cleanly.
SIGHUP- Sending a SIGHUP to the process will cause it to re-execute the
taler-exchange-httpd binary in the PATH, passing it the existing
listen socket. Then the old server process will automatically exit
after it is done handling existing client connections; the new server
process will accept and handle new client connections.
14.22.5. See Also
taler-exchange-dbinit(1), taler-exchange-offline(1),
taler-exchange-reservemod(1), taler.conf(5).