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multipart.go
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multipart.go
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// Copyright 2020 Huawei Technologies Co.,Ltd.
//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 def
import (
"errors"
"fmt"
"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/converter"
"io"
"mime/multipart"
"net/textproto"
"os"
"path/filepath"
"strings"
)
var quoteEscape = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
func escapeQuotes(s string) string {
return quoteEscape.Replace(s)
}
type FilePart struct {
Headers textproto.MIMEHeader
Content *os.File
}
func NewFilePart(content *os.File) *FilePart {
return &FilePart{
Content: content,
}
}
func NewFilePartWithContentType(content *os.File, contentType string) *FilePart {
var headers = make(textproto.MIMEHeader)
headers.Set("Content-Type", contentType)
return &FilePart{
Headers: headers,
Content: content,
}
}
func (f FilePart) Write(w *multipart.Writer, name string) error {
var h textproto.MIMEHeader
if f.Headers != nil {
h = f.Headers
} else {
h = make(textproto.MIMEHeader)
}
filename := filepath.Base(f.Content.Name())
if filename == "" {
return errors.New("failed to obtain filename from: " + f.Content.Name())
}
h.Set("Content-Disposition",
fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
escapeQuotes(name), escapeQuotes(filename)))
if f.Headers.Get("Content-Type") == "" {
h.Set("Content-Type", "application/octet-stream")
}
writer, err := w.CreatePart(h)
if err != nil {
return err
}
_, err = io.Copy(writer, f.Content)
return err
}
type MultiPart struct {
Content interface{}
}
func NewMultiPart(content interface{}) *MultiPart {
return &MultiPart{
Content: content,
}
}
func (m MultiPart) Write(w *multipart.Writer, name string) error {
err := w.WriteField(name, converter.ConvertInterfaceToString(m.Content))
return err
}
type FormData interface {
Write(*multipart.Writer, string) error
}