mirror of https://github.com/miniflux/v2.git
102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
|
|
// Use of this source code is governed by the Apache 2.0
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package client // import "miniflux.app/http/client"
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"io/ioutil"
|
|
"mime"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"golang.org/x/net/html/charset"
|
|
)
|
|
|
|
var xmlEncodingRegex = regexp.MustCompile(`<\?xml(.*)encoding="(.+)"(.*)\?>`)
|
|
|
|
// Response wraps a server response.
|
|
type Response struct {
|
|
Body io.Reader
|
|
StatusCode int
|
|
EffectiveURL string
|
|
LastModified string
|
|
ETag string
|
|
ContentType string
|
|
ContentLength int64
|
|
}
|
|
|
|
// IsNotFound returns true if the resource doesn't exists anymore.
|
|
func (r *Response) IsNotFound() bool {
|
|
return r.StatusCode == 404 || r.StatusCode == 410
|
|
}
|
|
|
|
// IsNotAuthorized returns true if the resource require authentication.
|
|
func (r *Response) IsNotAuthorized() bool {
|
|
return r.StatusCode == 401
|
|
}
|
|
|
|
// HasServerFailure returns true if the status code represents a failure.
|
|
func (r *Response) HasServerFailure() bool {
|
|
return r.StatusCode >= 400
|
|
}
|
|
|
|
// IsModified returns true if the resource has been modified.
|
|
func (r *Response) IsModified(etag, lastModified string) bool {
|
|
if r.StatusCode == 304 {
|
|
return false
|
|
}
|
|
|
|
if r.ETag != "" && r.ETag == etag {
|
|
return false
|
|
}
|
|
|
|
if r.LastModified != "" && r.LastModified == lastModified {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
// EnsureUnicodeBody makes sure the body is encoded in UTF-8.
|
|
//
|
|
// If a charset other than UTF-8 is detected, we convert the document to UTF-8.
|
|
// This is used by the scraper and feed readers.
|
|
//
|
|
// Do not forget edge cases:
|
|
//
|
|
// - Feeds with encoding specified only in Content-Type header and not in XML document
|
|
// - Feeds with encoding specified in both places
|
|
// - Feeds with encoding specified only in XML document and not in HTTP header
|
|
// - Feeds with wrong encoding defined and already in UTF-8
|
|
func (r *Response) EnsureUnicodeBody() (err error) {
|
|
if r.ContentType != "" {
|
|
mediaType, _, mediaErr := mime.ParseMediaType(r.ContentType)
|
|
if mediaErr != nil {
|
|
return mediaErr
|
|
}
|
|
|
|
if strings.Contains(mediaType, "xml") {
|
|
buffer, _ := ioutil.ReadAll(r.Body)
|
|
r.Body = bytes.NewReader(buffer)
|
|
|
|
// We ignore documents with encoding specified in XML prolog.
|
|
// This is going to be handled by the XML parser.
|
|
if xmlEncodingRegex.Match(buffer[0:1024]) {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
r.Body, err = charset.NewReader(r.Body, r.ContentType)
|
|
return err
|
|
}
|
|
|
|
// String returns the response body as string.
|
|
func (r *Response) String() string {
|
|
bytes, _ := ioutil.ReadAll(r.Body)
|
|
return string(bytes)
|
|
}
|