sttp.client4.logging.LoggingBackend can log requests and responses which end successfully or with an exception. It can be created given:
sttp.client4.logging.Logger, which is an integration point with logging libraries. Two such integration that are available with sttp-client is slf4j and scribe (see below), but custom ones can be easily added.
sttp.client4.logging.Log, which constructs messages and performs logging actions. A custom implementation can be provided to change the message content or use dynamic log levels.
By default, the following options are exposed:
includeTiming- should the duration of the request be included in the log message
beforeCurlInsteadOfShow- before sending a request, instead of a summary of the request to be sent, log the curl command which corresponds to the request
logRequestBody- should the request body be logged before sending the request (if the request body can be logged)
logRequestHeaders- should the non-sensitive request headers be logged before sending the request
logResponseBody- should the response body be logged after receiving a response to the request (if the response body can be replayed)
logResponseHeaders- should the non-sensitive response headers be logged
The messages are by default logged on these levels:
DEBUGbefore the request is sent
DEBUGwhen a request completes successfully (with a 1xx/2xx status code)
WARNwhen a request completes successfully (with a 4xx/5xx status code)
ERRORwhen there’s an exception when sending a request
Log levels can be configured when creating the
LoggingBackend, or specified independently in a custom implementation of
To use the slf4j logging backend wrapper, add the following dependency to your project:
"com.softwaremill.sttp.client4" %% "slf4j-backend" % "4.0.0-M9"
There are three backend wrappers available, which log request & response information using a slf4j
Logger. To see the logs, you’ll need to use an slf4j-compatible logger implementation, e.g. logback, or use a binding, e.g. log4j-slf4j.
val backend = Slf4jLoggingBackend(DefaultSyncBackend())
To create a customised logging backend, see the section on custom backends.
To use the scribe logging backend wrapper, add the following dependency to your project:
"com.softwaremill.sttp.client4" %% "scribe-backend" % "4.0.0-M9"