Class EncoderRegistry
- java.lang.Object
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- groovyx.net.http.EncoderRegistry
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public class EncoderRegistry extends Object implements Iterable<Map.Entry<String,groovy.lang.Closure>>
This class handles creation of the request body (i.e. for a PUT or POST operation) based on content-type. When a
body
is set from the builder, it is processed based on therequest content-type
. For instance, theencodeForm(Map)
method will be invoked if the request content-type is form-urlencoded, which will cause the following:body=[a:1, b:'two']
to be encoded as the equivalenta=1&b=two
in the request body.Most default encoders can handle a closure as a request body. In this case, the closure is executed and a suitable 'builder' passed to the closure that is used for constructing the content. In the case of binary encoding this would be an OutputStream; for TEXT encoding it would be a PrintWriter, and for XML it would be an already-bound
StreamingMarkupBuilder
. See eachencode...
method for details for each particular content-type.Contrary to its name, this class does not have anything to do with the
content-encoding
HTTP header.
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Constructor Summary
Constructors Constructor Description EncoderRegistry()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected Map<String,groovy.lang.Closure>
buildDefaultEncoderMap()
Returns a map of default encoders.protected org.apache.http.entity.StringEntity
createEntity(Object ct, String data)
Helper method used by encoder methods to create anHttpEntity
instance that encapsulates the request data.org.apache.http.HttpEntity
encodeForm(String formData, Object contentType)
Accepts a String as a url-encoded form post.org.apache.http.client.entity.UrlEncodedFormEntity
encodeForm(Map<?,?> params)
Set the request body as a url-encoded list of parameters.org.apache.http.client.entity.UrlEncodedFormEntity
encodeForm(Map<?,?> params, Object contentType)
org.apache.http.HttpEntity
encodeJSON(Object model, Object contentType)
Accepts a Collection or a JavaBean object which is converted to JSON.org.apache.http.entity.InputStreamEntity
encodeStream(Object data, Object contentType)
Default request encoder for a binary stream.org.apache.http.HttpEntity
encodeText(Object data, Object contentType)
Default handler used for a plain text content-type.org.apache.http.HttpEntity
encodeXML(Object xml, Object contentType)
Encode the content as XML.groovy.lang.Closure
getAt(Object contentType)
Retrieve a encoder for the given content-type.Iterator<Map.Entry<String,groovy.lang.Closure>>
iterator()
Iterate over the entire parser mapgroovy.lang.Closure
propertyMissing(Object key)
Alias forgetAt(Object)
to allow property-style access.void
propertyMissing(Object key, groovy.lang.Closure value)
Alias forputAt(Object, Closure)
to allow property-style access.void
putAt(Object contentType, groovy.lang.Closure value)
Register a new encoder for the given content type.void
setCharset(String charset)
Set the charset used in the content-type header of all requests that send textual data.-
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface java.lang.Iterable
forEach, spliterator
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Method Detail
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setCharset
public void setCharset(String charset)
Set the charset used in the content-type header of all requests that send textual data. This must be a chaset supported by the Java platform- Parameters:
charset
-- See Also:
Charset.forName(String)
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encodeStream
public org.apache.http.entity.InputStreamEntity encodeStream(Object data, Object contentType) throws UnsupportedEncodingException
Default request encoder for a binary stream. Acceptable argument types are:- InputStream
- byte[] / ByteArrayOutputStream
- Closure
- Parameters:
data
-- Returns:
- an
HttpEntity
encapsulating this request data - Throws:
UnsupportedEncodingException
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encodeText
public org.apache.http.HttpEntity encodeText(Object data, Object contentType) throws IOException
Default handler used for a plain text content-type. Acceptable argument types are:- Closure
- Writable
- Reader
PrintWriter
is passed as the single argument to the closure. Any data sent to the writer from the closure will be sent to the request content body.- Parameters:
data
-- Returns:
- an
HttpEntity
encapsulating this request data - Throws:
IOException
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encodeForm
public org.apache.http.client.entity.UrlEncodedFormEntity encodeForm(Map<?,?> params) throws UnsupportedEncodingException
Set the request body as a url-encoded list of parameters. This is typically used to simulate a HTTP form POST. For multi-valued parameters, enclose the values in a list, e.g.[ key1 : ['val1', 'val2'], key2 : 'etc.' ]
- Parameters:
params
-- Returns:
- an
HttpEntity
encapsulating this request data - Throws:
UnsupportedEncodingException
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encodeForm
public org.apache.http.client.entity.UrlEncodedFormEntity encodeForm(Map<?,?> params, Object contentType) throws UnsupportedEncodingException
- Throws:
UnsupportedEncodingException
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encodeForm
public org.apache.http.HttpEntity encodeForm(String formData, Object contentType) throws UnsupportedEncodingException
Accepts a String as a url-encoded form post. This method assumes the String is an already-encoded POST string.- Parameters:
formData
- a url-encoded form POST string. See The W3C spec for more info.- Returns:
- an
HttpEntity
encapsulating this request data - Throws:
UnsupportedEncodingException
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encodeXML
public org.apache.http.HttpEntity encodeXML(Object xml, Object contentType) throws UnsupportedEncodingException
Encode the content as XML. The argument may be either an object whosetoString
produces valid markup, or a Closure which will be interpreted as a builder definition. A closure argument is passed toStreamingMarkupBuilder#bind(groovy.lang.Closure)
.- Parameters:
xml
- data that defines the XML structure- Returns:
- an
HttpEntity
encapsulating this request data - Throws:
UnsupportedEncodingException
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encodeJSON
public org.apache.http.HttpEntity encodeJSON(Object model, Object contentType) throws UnsupportedEncodingException
Accepts a Collection or a JavaBean object which is converted to JSON. A Map or POJO/POGO will be converted to a
JSONObject
, and any other collection type will be converted to aJSONArray
. A String or GString will be interpreted as valid JSON and passed directly as the request body (with charset conversion if necessary.)If a Closure is passed as the model, it will be executed as if it were a JSON object definition passed to a
JsonGroovyBuilder
. In order for the closure to be interpreted correctly, there must be a 'root' element immediately inside the closure. For example:builder.post( JSON ) { body = { root { first { one = 1 two = '2' } second = 'some string' } } }
will return the following JSON string:
{"root":{"first":{"one":1,"two":"2"},"second":"some string"}}
- Parameters:
model
- data to be converted to JSON, as specified above.- Returns:
- an
HttpEntity
encapsulating this request data - Throws:
UnsupportedEncodingException
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createEntity
protected org.apache.http.entity.StringEntity createEntity(Object ct, String data) throws UnsupportedEncodingException
Helper method used by encoder methods to create anHttpEntity
instance that encapsulates the request data. This may be used by any non-streaming encoder that needs to send textual data. It also sets thecharset
portion of the content-type header.- Parameters:
ct
- content-type of the datadata
- textual request data to be encoded- Returns:
- an instance to be used for the
request content
- Throws:
UnsupportedEncodingException
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buildDefaultEncoderMap
protected Map<String,groovy.lang.Closure> buildDefaultEncoderMap()
Returns a map of default encoders. Override this method to change what encoders are registered by default. You can of course callsuper.buildDefaultEncoderMap()
and then add or remove from that result as well.
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getAt
public groovy.lang.Closure getAt(Object contentType)
Retrieve a encoder for the given content-type. This is called by HTTPBuilder to retrieve the correct encoder for a given content-type. The encoder is then used to serialize the request data in the request body.- Parameters:
contentType
-- Returns:
- encoder that can interpret the given content type, or null.
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putAt
public void putAt(Object contentType, groovy.lang.Closure value)
Register a new encoder for the given content type. If any encoder previously existed for that content type it will be replaced. The closure must return anHttpEntity
. It will also usually accept a single argument, which will be whatever is set in the request configuration closure viaHTTPBuilder.RequestConfigDelegate.setBody(Object)
.- Parameters:
contentType
-closure
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propertyMissing
public groovy.lang.Closure propertyMissing(Object key)
Alias forgetAt(Object)
to allow property-style access.- Parameters:
key
-- Returns:
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propertyMissing
public void propertyMissing(Object key, groovy.lang.Closure value)
Alias forputAt(Object, Closure)
to allow property-style access.- Parameters:
key
-value
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