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119 lines
3.9 KiB
119 lines
3.9 KiB
package restful
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// Copyright 2013 Ernest Micklei. All rights reserved.
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// Use of this source code is governed by a license
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// that can be found in the LICENSE file.
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import (
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"compress/zlib"
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"net/http"
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)
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var defaultRequestContentType string
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// Request is a wrapper for a http Request that provides convenience methods
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type Request struct {
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Request *http.Request
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pathParameters map[string]string
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attributes map[string]interface{} // for storing request-scoped values
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selectedRoutePath string // root path + route path that matched the request, e.g. /meetings/{id}/attendees
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}
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func NewRequest(httpRequest *http.Request) *Request {
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return &Request{
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Request: httpRequest,
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pathParameters: map[string]string{},
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attributes: map[string]interface{}{},
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} // empty parameters, attributes
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}
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// If ContentType is missing or */* is given then fall back to this type, otherwise
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// a "Unable to unmarshal content of type:" response is returned.
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// Valid values are restful.MIME_JSON and restful.MIME_XML
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// Example:
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// restful.DefaultRequestContentType(restful.MIME_JSON)
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func DefaultRequestContentType(mime string) {
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defaultRequestContentType = mime
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}
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// PathParameter accesses the Path parameter value by its name
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func (r *Request) PathParameter(name string) string {
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return r.pathParameters[name]
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}
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// PathParameters accesses the Path parameter values
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func (r *Request) PathParameters() map[string]string {
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return r.pathParameters
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}
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// QueryParameter returns the (first) Query parameter value by its name
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func (r *Request) QueryParameter(name string) string {
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return r.Request.FormValue(name)
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}
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// QueryParameters returns the all the query parameters values by name
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func (r *Request) QueryParameters(name string) []string {
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return r.Request.URL.Query()[name]
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}
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// BodyParameter parses the body of the request (once for typically a POST or a PUT) and returns the value of the given name or an error.
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func (r *Request) BodyParameter(name string) (string, error) {
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err := r.Request.ParseForm()
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if err != nil {
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return "", err
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}
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return r.Request.PostFormValue(name), nil
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}
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// HeaderParameter returns the HTTP Header value of a Header name or empty if missing
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func (r *Request) HeaderParameter(name string) string {
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return r.Request.Header.Get(name)
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}
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// ReadEntity checks the Accept header and reads the content into the entityPointer.
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func (r *Request) ReadEntity(entityPointer interface{}) (err error) {
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contentType := r.Request.Header.Get(HEADER_ContentType)
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contentEncoding := r.Request.Header.Get(HEADER_ContentEncoding)
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// check if the request body needs decompression
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if ENCODING_GZIP == contentEncoding {
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gzipReader := currentCompressorProvider.AcquireGzipReader()
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defer currentCompressorProvider.ReleaseGzipReader(gzipReader)
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gzipReader.Reset(r.Request.Body)
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r.Request.Body = gzipReader
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} else if ENCODING_DEFLATE == contentEncoding {
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zlibReader, err := zlib.NewReader(r.Request.Body)
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if err != nil {
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return err
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}
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r.Request.Body = zlibReader
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}
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// lookup the EntityReader, use defaultRequestContentType if needed and provided
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entityReader, ok := entityAccessRegistry.accessorAt(contentType)
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if !ok {
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if len(defaultRequestContentType) != 0 {
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entityReader, ok = entityAccessRegistry.accessorAt(defaultRequestContentType)
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}
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if !ok {
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return NewError(http.StatusBadRequest, "Unable to unmarshal content of type:"+contentType)
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}
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}
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return entityReader.Read(r, entityPointer)
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}
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// SetAttribute adds or replaces the attribute with the given value.
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func (r *Request) SetAttribute(name string, value interface{}) {
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r.attributes[name] = value
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}
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// Attribute returns the value associated to the given name. Returns nil if absent.
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func (r Request) Attribute(name string) interface{} {
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return r.attributes[name]
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}
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// SelectedRoutePath root path + route path that matched the request, e.g. /meetings/{id}/attendees
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func (r Request) SelectedRoutePath() string {
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return r.selectedRoutePath
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}
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