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131 lines
5.4 KiB
Markdown
131 lines
5.4 KiB
Markdown
# Response
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## Definition
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Responses can be used to capture values to perform subsequent requests, or add asserts to HTTP responses. Response on
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requests are optional, a Hurl file can just consist of a sequence of [requests].
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A response describes the expected HTTP response, with mandatory [version and status], followed by optional [headers],
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[captures], [asserts] and [body]. Assertions in the expected HTTP response describe values of the received HTTP response.
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Captures capture values from the received HTTP response and populate a set of named variables that can be used
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in the following entries.
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## Example
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```hurl
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GET https://example.org
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HTTP 200
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Last-Modified: Wed, 21 Oct 2015 07:28:00 GMT
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[Asserts]
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xpath "normalize-space(//head/title)" startsWith "Welcome"
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xpath "//li" count == 18
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```
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## Structure
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<div class="hurl-structure-schema">
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<div class="hurl-structure">
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<div class="hurl-structure-col-0">
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<div class="hurl-part-0">
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HTTP 200
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</div>
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<div class=" hurl-part-1">
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content-length: 206<br>accept-ranges: bytes<br>user-agent: Test
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</div>
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<div class="hurl-part-2">
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[Captures]<br>...
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</div>
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<div class="hurl-part-2">
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[Asserts]<br>...
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</div>
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<div class="hurl-part-3">
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{<br>
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"type": "FOO",<br>
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"value": 356789,<br>
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"ordered": true,<br>
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"index": 10<br>
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}
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</div>
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</div>
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<div class="hurl-structure-col-1">
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<div class="hurl-request-explanation-part-0">
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<a href="/docs/asserting-response.html#version-status">Version and status (mandatory if response present)</a>
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</div>
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<div class="hurl-request-explanation-part-1">
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<br><a href="/docs/asserting-response.html#headers">HTTP response headers</a> (optional)
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</div>
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<div class="hurl-request-explanation-part-2">
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<br>
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<br>
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</div>
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<div class="hurl-request-explanation-part-2">
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<a href="/docs/capturing-response.html">Captures</a> and <a href="/docs/asserting-response.html#asserts">asserts</a> (optional sections, unordered)
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</div>
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<div class="hurl-request-explanation-part-2">
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<br>
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<br>
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<br>
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<br>
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</div>
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<div class="hurl-request-explanation-part-3">
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<a href="/docs/asserting-response.html#body">HTTP response body</a> (optional)
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</div>
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</div>
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</div>
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</div>
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## Capture and Assertion
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With the response section, one can optionally [capture value from headers, body],
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or [add assert on status code, body or headers].
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### Body compression
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Hurl outputs the raw HTTP body to stdout by default. If response body is compressed (using [br, gzip, deflate]),
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the binary stream is output, without any modification. One can use [`--compressed` option]
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to request a compressed response and automatically get the decompressed body.
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Captures and asserts work automatically on the decompressed body, so you can request compressed data (using [`Accept-Encoding`]
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header by example) and add assert and captures on the decoded body as if there weren't any compression.
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## Timings
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HTTP response timings are exposed through Hurl structured output (see [`--json`]) and HTML report (see [`--report-html`]).
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On each response, libcurl response timings are available:
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- __time_namelookup__: the time it took from the start until the name resolving was completed. You can use
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[`--resolve`] to exclude DNS performance from the measure.
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- __time_connect__: The time it took from the start until the TCP connect to the remote host (or proxy) was completed.
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- __time_appconnect__: The time it took from the start until the SSL/SSH/etc connect/handshake to the remote host was
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completed. The client is then ready to send its HTTP GET request.
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- __time_starttransfer__: The time it took from the start until the first byte was just about to be transferred
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(just before Hurl reads the first byte from the network). This includes time_pretransfer and also the time the server
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needed to calculate the result.
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- __time_total__: The total time that the full operation lasted.
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All timings are in microsecond.
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<div class="picture">
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<img class="u-theme-light u-drop-shadow u-border u-max-width-100" src="/docs/assets/img/timings-light.svg" alt="Response timings explanation"/>
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<img class="u-theme-dark u-drop-shadow u-border u-max-width-100" src="/docs/assets/img/timings-dark.svg" alt="Response timings explanation"/>
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<a href="https://blog.cloudflare.com/a-question-of-timing/"><small>Courtesy of CloudFlare</small></a>
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</div>
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[requests]: /docs/request.md
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[version and status]: /docs/asserting-response.md#version-status
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[headers]: /docs/asserting-response.md#headers
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[captures]: /docs/capturing-response.md#captures
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[asserts]: /docs/asserting-response.md#asserts
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[body]: /docs/asserting-response.md#body
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[capture value from headers, body]: /docs/capturing-response.md
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[add assert on status code, body or headers]: /docs/asserting-response.md
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[br, gzip, deflate]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding
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[`--compressed` option]: /docs/manual.md#compressed
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[`Accept-Encoding`]: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding
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[`--json`]: /docs/manual.md#json
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[`--report-html`]: /docs/manual.md#report-html
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[`--resolve`]: /docs/manual.md#resolve
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