forked from bytedance/go-tagexpr
/
httpbody.go
146 lines (135 loc) · 3.93 KB
/
httpbody.go
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// Copyright 2022 AndeyaLee Author. All Rights Reserved.
//
// 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 httpbody
import (
"bytes"
"encoding/json"
"encoding/xml"
"io"
"mime/multipart"
"net/url"
"os"
"strings"
)
// NewFormBody returns form request content type and body reader.
// NOTE:
// @values format: <fieldName,[value]>
// @files format: <fieldName,[fileName]>
func NewFormBody(values, files url.Values) (contentType string, bodyReader io.Reader, err error) {
if len(files) == 0 {
return "application/x-www-form-urlencoded", strings.NewReader(values.Encode()), nil
}
var rw = bytes.NewBuffer(make([]byte, 0, 32*1024*len(files)))
var bodyWriter = multipart.NewWriter(rw)
var buf = make([]byte, 32*1024)
var fileWriter io.Writer
var f *os.File
for fieldName, postfiles := range files {
for _, fileName := range postfiles {
fileWriter, err = bodyWriter.CreateFormFile(fieldName, fileName)
if err != nil {
return
}
f, err = os.Open(fileName)
if err != nil {
return
}
_, err = io.CopyBuffer(fileWriter, f, buf)
f.Close()
if err != nil {
return
}
}
}
for k, v := range values {
for _, vv := range v {
bodyWriter.WriteField(k, vv)
}
}
bodyWriter.Close()
return bodyWriter.FormDataContentType(), rw, nil
}
type (
// Files maps a string key to a list of files.
Files map[string][]File
// File interface for form.
File interface {
// Name returns the name of the file as presented to Open.
Name() string
// Read reads up to len(b) bytes from the File.
// It returns the number of bytes read and any error encountered.
// At end of file, Read returns 0, io.EOF.
Read(p []byte) (n int, err error)
}
)
// NewFormBody2 returns form request content type and body reader.
// NOTE:
// @values format: <fieldName,[value]>
// @files format: <fieldName,[File]>
func NewFormBody2(values url.Values, files Files) (contentType string, bodyReader io.Reader) {
if len(files) == 0 {
return "application/x-www-form-urlencoded", strings.NewReader(values.Encode())
}
var pr, pw = io.Pipe()
var bodyWriter = multipart.NewWriter(pw)
var fileWriter io.Writer
var buf = make([]byte, 32*1024)
go func() {
for fieldName, postfiles := range files {
for _, file := range postfiles {
fileWriter, _ = bodyWriter.CreateFormFile(fieldName, file.Name())
io.CopyBuffer(fileWriter, file, buf)
}
}
for k, v := range values {
for _, vv := range v {
bodyWriter.WriteField(k, vv)
}
}
bodyWriter.Close()
pw.Close()
}()
return bodyWriter.FormDataContentType(), pr
}
// NewFile creates a file for HTTP form.
func NewFile(name string, bodyReader io.Reader) File {
return &fileReader{name, bodyReader}
}
// fileReader file name and bytes.
type fileReader struct {
name string
bodyReader io.Reader
}
func (f *fileReader) Name() string {
return f.name
}
func (f *fileReader) Read(p []byte) (int, error) {
return f.bodyReader.Read(p)
}
// NewJSONBody returns JSON request content type and body reader.
func NewJSONBody(v interface{}) (contentType string, bodyReader io.Reader, err error) {
b, err := json.Marshal(v)
if err != nil {
return
}
return "application/json;charset=utf-8", bytes.NewReader(b), nil
}
// NewXMLBody returns XML request content type and body reader.
func NewXMLBody(v interface{}) (contentType string, bodyReader io.Reader, err error) {
b, err := xml.Marshal(v)
if err != nil {
return
}
return "application/xml;charset=utf-8", bytes.NewReader(b), nil
}