IMPORTANT: In July 2025, we stopped releasing new versions of KTX modules, and we removed the KTX libraries from the Firebase Android BoM (v34.0.0). If you use KTX APIs from the previously released KTX modules, we recommend that you migrate your app to use KTX APIs from the main modules instead. For details, see the FAQ about this initiative.

HttpMetric

class HttpMetric

Metric used to collect data for network requests/responses. A new object must be used for every request/response. This class is not thread safe.

Summary

Constants
`const Int`	`MAX_ATTRIBUTE_KEY_LENGTH = 40` Maximum allowed length of the Key of the `Trace` attribute
`const Int`	`MAX_ATTRIBUTE_VALUE_LENGTH = 100` Maximum allowed length of the Value of the `Trace` attribute
`const Int`	`MAX_TRACE_CUSTOM_ATTRIBUTES = 5` Maximum allowed number of attributes allowed in a trace.
`const Int`	`MAX_TRACE_NAME_LENGTH = 100` Maximum allowed length of the name of the `Trace`

Public functions
`String?`	`getAttribute(attribute: String)` Returns the value of an attribute.
`(Mutable)Map<String!, String!>`	`getAttributes()` Returns the map of all the attributes added to this HttpMetric.
`Unit`	`putAttribute(attribute: String, value: String)` Sets a String value for the specified attribute.
`Unit`	`removeAttribute(attribute: String)` Removes an already added attribute from the HttpMetric.
`Unit`	`setHttpResponseCode(responseCode: Int)` Sets the httpResponse code of the request
`Unit`	`setRequestPayloadSize(bytes: Long)` Sets the size of the request payload
`Unit`	`setResponseContentType(contentType: String?)` Content type of the response such as text/html, application/json, etc...
`Unit`	`setResponsePayloadSize(bytes: Long)` Sets the size of the response payload
`Unit`	`start()` Marks the start time of the request
`Unit`	`stop()` Marks the end time of the response and queues the network request metric on the device for transmission.

Extension functions
`inline Unit`	`HttpMetric.trace(block: HttpMetric.() -> Unit)` Measures the time it takes to run the `block` wrapped by calls to start and stop using `HttpMetric`.

Constants

MAX_ATTRIBUTE_KEY_LENGTH

const val MAX_ATTRIBUTE_KEY_LENGTH = 40: Int

Maximum allowed length of the Key of the Trace attribute

MAX_ATTRIBUTE_VALUE_LENGTH

const val MAX_ATTRIBUTE_VALUE_LENGTH = 100: Int

Maximum allowed length of the Value of the Trace attribute

MAX_TRACE_CUSTOM_ATTRIBUTES

const val MAX_TRACE_CUSTOM_ATTRIBUTES = 5: Int

Maximum allowed number of attributes allowed in a trace.

MAX_TRACE_NAME_LENGTH

const val MAX_TRACE_NAME_LENGTH = 100: Int

Maximum allowed length of the name of the Trace

Public functions

getAttribute

fun getAttribute(attribute: String): String?

Returns the value of an attribute.

Parameters
`attribute: String`	name of the attribute to fetch the value for

Returns
`String?`	The value of the attribute if it exists or null otherwise.

getAttributes

fun getAttributes(): (Mutable)Map<String!, String!>

Returns the map of all the attributes added to this HttpMetric.

Returns
`(Mutable)Map<String!, String!>`	map of attributes and its values currently added to this HttpMetric

putAttribute

fun putAttribute(attribute: String, value: String): Unit

Sets a String value for the specified attribute. Updates the value of the attribute if the attribute already exists. If the HttpMetric has been stopped, this method returns without adding the attribute. The maximum number of attributes that can be added to a HttpMetric are MAX_TRACE_CUSTOM_ATTRIBUTES.

Parameters
`attribute: String`	name of the attribute
`value: String`	value of the attribute

removeAttribute

fun removeAttribute(attribute: String): Unit

Removes an already added attribute from the HttpMetric. If the HttpMetric has already been stopped, this method returns without removing the attribute.

Parameters
`attribute: String`	name of the attribute to be removed from the running Traces.

setHttpResponseCode

fun setHttpResponseCode(responseCode: Int): Unit

Sets the httpResponse code of the request

Parameters
`responseCode: Int`	valid values are greater than 0. Invalid usage will be logged.

setRequestPayloadSize

fun setRequestPayloadSize(bytes: Long): Unit

Sets the size of the request payload

Parameters
`bytes: Long`	valid values are greater than or equal to 0. Invalid usage will be logged.

setResponseContentType

fun setResponseContentType(contentType: String?): Unit

Content type of the response such as text/html, application/json, etc...

Parameters
`contentType: String?`	valid string of MIME type. Invalid usage will be logged.

setResponsePayloadSize

fun setResponsePayloadSize(bytes: Long): Unit

Sets the size of the response payload

Parameters
`bytes: Long`	valid values are greater than or equal to 0. Invalid usage will be logged.

start

fun start(): Unit

Marks the start time of the request

stop

fun stop(): Unit

Marks the end time of the response and queues the network request metric on the device for transmission. Check logcat for transmission info.

Extension functions

trace

inline fun HttpMetric.trace(block: HttpMetric.() -> Unit): Unit

Measures the time it takes to run the block wrapped by calls to start and stop using HttpMetric.