forked from go-swagger/go-swagger
/
request.go
218 lines (193 loc) · 5.89 KB
/
request.go
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// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package client
import (
"bytes"
"fmt"
"io"
"mime/multipart"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
"github.com/go-swagger/go-swagger/client"
"github.com/go-swagger/go-swagger/httpkit"
"github.com/go-swagger/go-swagger/strfmt"
)
// NewRequest creates a new swagger http client request
func newRequest(method, pathPattern string, writer client.RequestWriter) (*request, error) {
return &request{
pathPattern: pathPattern,
method: method,
writer: writer,
header: make(http.Header),
query: make(url.Values),
}, nil
}
// Request represents a swagger client request.
//
// This Request struct converts to a HTTP request.
// There might be others that convert to other transports.
// There is no error checking here, it is assumed to be used after a spec has been validated.
// so impossible combinations should not arise (hopefully).
//
// The main purpose of this struct is to hide the machinery of adding params to a transport request.
// The generated code only implements what is necessary to turn a param into a valid value for these methods.
type request struct {
pathPattern string
method string
writer client.RequestWriter
runtime *Runtime
pathParams map[string]string
header http.Header
query url.Values
formFields url.Values
fileFields map[string]*os.File
payload interface{}
}
var (
// ensure interface compliance
_ client.Request = new(request)
)
// BuildHTTP creates a new http request based on the data from the params
func (r *request) BuildHTTP(producer httpkit.Producer, registry strfmt.Registry) (*http.Request, error) {
// build the data
if err := r.writer.WriteToRequest(r, registry); err != nil {
return nil, err
}
// create http request
path := r.pathPattern
for k, v := range r.pathParams {
path = strings.Replace(path, "{"+k+"}", v, -1)
}
// TODO: Support uploading huge bodies!
// Not too excited about the buffer here, but it keeps me going for now
body := bytes.NewBuffer(nil)
req, err := http.NewRequest(r.method, path, body)
if err != nil {
return nil, err
}
req.URL.RawQuery = r.query.Encode()
req.Header = r.header
// check if this is a form type request
if r.formFields != nil {
// check if this is multipart
if r.fileFields != nil {
mp := multipart.NewWriter(body)
defer mp.Close()
req.Header.Set(httpkit.HeaderContentType, mp.FormDataContentType())
for fn, v := range r.formFields {
if len(v) > 0 {
if err := mp.WriteField(fn, v[0]); err != nil {
return nil, err
}
}
}
for fn, f := range r.fileFields {
wrtr, err := mp.CreateFormFile(fn, filepath.Base(f.Name()))
if err != nil {
return nil, err
}
defer func() {
for _, ff := range r.fileFields {
ff.Close()
}
}()
// TODO: Support uploading huge files!
// Stop this copy insanity!
if _, err := io.Copy(wrtr, f); err != nil {
return nil, err
}
}
return req, nil
}
body.WriteString(r.formFields.Encode())
return req, nil
}
// write the form values as body
// if there is payload, use the producer to write the payload
if r.payload != nil {
if err := producer.Produce(body, r.payload); err != nil {
return nil, err
}
}
return req, nil
}
// SetHeaderParam adds a header param to the request
// when there is only 1 value provided for the varargs, it will set it.
// when there are several values provided for the varargs it will add it (no overriding)
func (r *request) SetHeaderParam(name string, values ...string) error {
if r.header == nil {
r.header = make(http.Header)
}
r.header[http.CanonicalHeaderKey(name)] = values
return nil
}
// SetQueryParam adds a query param to the request
// when there is only 1 value provided for the varargs, it will set it.
// when there are several values provided for the varargs it will add it (no overriding)
func (r *request) SetQueryParam(name string, values ...string) error {
if r.header == nil {
r.query = make(url.Values)
}
r.query[name] = values
return nil
}
// SetFormParam adds a forn param to the request
// when there is only 1 value provided for the varargs, it will set it.
// when there are several values provided for the varargs it will add it (no overriding)
func (r *request) SetFormParam(name string, values ...string) error {
if r.formFields == nil {
r.formFields = make(url.Values)
}
r.formFields[name] = values
return nil
}
// SetPathParam adds a path param to the request
func (r *request) SetPathParam(name string, value string) error {
if r.pathParams == nil {
r.pathParams = make(map[string]string)
}
r.pathParams[name] = value
return nil
}
// SetFileParam adds a file param to the request
func (r *request) SetFileParam(name string, toSend string) error {
file, err := os.Open(toSend)
if err != nil {
return err
}
fi, err := file.Stat()
if err != nil {
return err
}
if fi.IsDir() {
return fmt.Errorf("%q is a directory, only files are supported", toSend)
}
if r.fileFields == nil {
r.fileFields = make(map[string]*os.File)
}
if r.formFields == nil {
r.formFields = url.Values(make(map[string][]string))
}
r.fileFields[name] = file
return nil
}
// SetBodyParam sets a body parameter on the request.
// This does not yet serialze the object, this happens as late as possible.
func (r *request) SetBodyParam(payload interface{}) error {
r.payload = payload
return nil
}