# Matching on Query string

Use the `:query` request matcher to match requests on the query string portion of the request URI.

You can use this (alone, or in combination with others) as an alternative to `:uri` so that non-deterministic portions of the URI are not considered as part of the request matching.

## Background ()

*Given* a previously recorded cassette file "cassettes/example.yml" with:

```
---
http_interactions:
- request:
    method: post
    uri: http://host1.com/query?date=2011-09-01
    body:
      encoding: UTF-8
      string: ""
    headers: {}
  response:
    status:
      code: 200
      message: OK
    headers:
      Content-Length:
      - "19"
    body:
      encoding: UTF-8
      string: 2011-09-01 response
    http_version: "1.1"
  recorded_at: Tue, 01 Nov 2011 04:58:44 GMT
- request:
    method: post
    uri: http://host1.com/query?date=2011-09-02
    body:
      encoding: UTF-8
      string: ""
    headers: {}
  response:
    status:
      code: 200
      message: OK
    headers:
      Content-Length:
      - "19"
    body:
      encoding: UTF-8
      string: 2011-09-02 response
    http_version: "1.1"
  recorded_at: Tue, 01 Nov 2011 04:58:44 GMT
recorded_with: VCR 2.0.0
```

## Replay interaction that matches the query string

*And* a file named "query\_matching.rb" with:

```
include_http_adapter_for("<http_lib>")

require 'vcr'

VCR.configure do |c|
  <configuration>
  c.default_cassette_options = { :match_requests_on => [:query] }
  c.cassette_library_dir = 'cassettes'
end

VCR.use_cassette('example', :match_requests_on => [:query]) do
  puts "Response for 2011-09-01 /query: " + response_body_for(:get, "http://example.com/query?date=2011-09-01")
end

VCR.use_cassette('example', :match_requests_on => [:query]) do
  puts "Response for 2011-09-02 /query: " + response_body_for(:get,  "http://example.com/query?date=2011-09-02")
end
```

*When* I run `ruby query_matching.rb`

*Then* it should pass with:

```
Response for 2011-09-01 /query: 2011-09-01 response
Response for 2011-09-02 /query: 2011-09-02 response
```

### Examples

| configuration          | http\_lib              |
| ---------------------- | ---------------------- |
| c.hook\_into :webmock  | net/http               |
| c.hook\_into :webmock  | httpclient             |
| c.hook\_into :webmock  | curb                   |
| c.hook\_into :webmock  | patron                 |
| c.hook\_into :webmock  | em-http-request        |
| c.hook\_into :webmock  | typhoeus               |
| c.hook\_into :typhoeus | typhoeus               |
| c.hook\_into :excon    | excon                  |
| c.hook\_into :faraday  | faraday (w/ net\_http) |
| c.hook\_into :faraday  | faraday (w/ typhoeus)  |