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90 lines
1.6 KiB
Go
90 lines
1.6 KiB
Go
package gomf
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import (
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"bytes"
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"context"
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"fmt"
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"mime/multipart"
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"net/http"
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"net/textproto"
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)
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type FormBuilder struct {
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w *multipart.Writer
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b *bytes.Buffer
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}
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func New() *FormBuilder {
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buf := new(bytes.Buffer)
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writer := multipart.NewWriter(buf)
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return &FormBuilder{
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w: writer,
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b: buf,
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}
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}
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func (ufw *FormBuilder) WriteField(name, value string) error {
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w, err := ufw.w.CreateFormField(name)
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if err != nil {
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return err
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}
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_, err = w.Write([]byte(value))
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if err != nil {
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return err
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}
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return nil
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}
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// WriteFile if contentType is empty-string, will auto convert to application/octet-stream
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func (ufw *FormBuilder) WriteFile(fieldName, fileName, contentType string, content []byte) error {
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if contentType == "" {
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contentType = "application/octet-stream"
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}
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wx, err := ufw.w.CreatePart(textproto.MIMEHeader{
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"Content-Type": []string{
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contentType,
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},
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"Content-Disposition": []string{
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fmt.Sprintf(`form-data; name="%s"; filename="%s"`, fieldName, fileName),
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},
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})
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if err != nil {
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return err
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}
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_, err = wx.Write(content)
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if err != nil {
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return err
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}
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return nil
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}
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func (fb *FormBuilder) Close() error {
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return fb.w.Close()
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}
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func (fb *FormBuilder) GetBuffer() *bytes.Buffer {
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return fb.b
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}
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func (fb *FormBuilder) GetHTTPRequest(ctx context.Context, reqURL string) (*http.Request, error) {
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err := fb.Close()
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if err != nil {
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return nil, err
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}
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req, err := http.NewRequest("POST", reqURL, fb.b)
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if err != nil {
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return nil, err
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}
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req.Header.Set("Content-Type", fb.w.FormDataContentType())
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req = req.WithContext(ctx)
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return req, nil
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}
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