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// 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 (
"io"
"mime"
"strings"
"github.com/miniflux/miniflux/logger"
"golang.org/x/net/html/charset"
)
// 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
}
// NormalizeBodyEncoding make 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:
// - Some non-utf8 feeds specify encoding only in Content-Type, not in XML document.
func (r *Response) NormalizeBodyEncoding() (io.Reader, error) {
_, params, err := mime.ParseMediaType(r.ContentType)
if err == nil {
if enc, found := params["charset"]; found {
enc = strings.ToLower(enc)
if enc != "utf-8" && enc != "utf8" && enc != "" {
logger.Debug("[NormalizeBodyEncoding] Convert body to UTF-8 from %s", enc)
return charset.NewReader(r.Body, r.ContentType)
}
}
}
return r.Body, nil
}
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