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/
MultipartFormDataObject.go
95 lines (80 loc) · 2.5 KB
/
MultipartFormDataObject.go
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package communication
import (
"crypto/rand"
"errors"
"fmt"
"strings"
)
// MultipartFormDataObject is a representation of a multipart/form-data object.
type MultipartFormDataObject struct {
boundary string
contentType string
values map[string]string
files map[string]UploadableFile
}
// GetBoundary returns the boundary.
func (multipart *MultipartFormDataObject) GetBoundary() string {
return multipart.boundary
}
// GetContentType returns the content type.
func (multipart *MultipartFormDataObject) GetContentType() string {
return multipart.contentType
}
// GetValues returns the values.
func (multipart *MultipartFormDataObject) GetValues() map[string]string {
return multipart.values
}
// GetFiles returns the files.
func (multipart *MultipartFormDataObject) GetFiles() map[string]UploadableFile {
return multipart.files
}
// AddValue adds a value parameter.
func (multipart *MultipartFormDataObject) AddValue(parameterName string, value string) error {
if strings.TrimSpace(parameterName) == "" {
return errors.New("parameterName is required")
}
if multipart.containsParameter(parameterName) {
return errors.New("duplicate parameterName: " + parameterName)
}
multipart.values[parameterName] = value
return nil
}
// AddFile adds a file parameter.
func (multipart *MultipartFormDataObject) AddFile(parameterName string, file UploadableFile) error {
if strings.TrimSpace(parameterName) == "" {
return errors.New("parameterName is required")
}
if multipart.containsParameter(parameterName) {
return errors.New("duplicate parameterName: " + parameterName)
}
multipart.files[parameterName] = file
return nil
}
func (multipart *MultipartFormDataObject) containsParameter(parameterName string) bool {
if _, contains := multipart.values[parameterName]; contains {
return true
}
if _, contains := multipart.files[parameterName]; contains {
return true
}
return false
}
// NewMultipartFormDataObject constructs a new MultipartFormDataObject
func NewMultipartFormDataObject() (*MultipartFormDataObject, error) {
boundary, err := pseudoUUID()
if err != nil {
return nil, err
}
contentType := "multipart/form-data; boundary=" + boundary
values := map[string]string{}
files := map[string]UploadableFile{}
return &MultipartFormDataObject{boundary, contentType, values, files}, nil
}
func pseudoUUID() (string, error) {
b := make([]byte, 16)
_, err := rand.Read(b)
if err != nil {
return "", err
}
return fmt.Sprintf("%X-%X-%X-%X-%X", b[0:4], b[4:6], b[6:8], b[8:10], b[10:]), nil
}