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// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
package fetcher // import "miniflux.app/v2/internal/reader/fetcher"
import (
"crypto/tls"
"encoding/base64"
"log/slog"
"net"
"net/http"
"net/url"
"time"
)
const (
defaultHTTPClientTimeout = 20
defaultHTTPClientMaxBodySize = 15 * 1024 * 1024
defaultAcceptHeader = "application/xml, application/atom+xml, application/rss+xml, application/rdf+xml, application/feed+json, text/html, */*;q=0.9"
)
type RequestBuilder struct {
headers http.Header
clientProxyURL string
useClientProxy bool
clientTimeout int
withoutRedirects bool
ignoreTLSErrors bool
disableHTTP2 bool
}
func NewRequestBuilder() *RequestBuilder {
return &RequestBuilder{
headers: make(http.Header),
clientTimeout: defaultHTTPClientTimeout,
}
}
func (r *RequestBuilder) WithHeader(key, value string) *RequestBuilder {
r.headers.Set(key, value)
return r
}
func (r *RequestBuilder) WithETag(etag string) *RequestBuilder {
if etag != "" {
r.headers.Set("If-None-Match", etag)
}
return r
}
func (r *RequestBuilder) WithLastModified(lastModified string) *RequestBuilder {
if lastModified != "" {
r.headers.Set("If-Modified-Since", lastModified)
}
return r
}
func (r *RequestBuilder) WithUserAgent(userAgent string, defaultUserAgent string) *RequestBuilder {
if userAgent != "" {
r.headers.Set("User-Agent", userAgent)
} else {
r.headers.Set("User-Agent", defaultUserAgent)
}
return r
}
func (r *RequestBuilder) WithCookie(cookie string) *RequestBuilder {
if cookie != "" {
r.headers.Set("Cookie", cookie)
}
return r
}
func (r *RequestBuilder) WithUsernameAndPassword(username, password string) *RequestBuilder {
if username != "" && password != "" {
r.headers.Set("Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(username+":"+password)))
}
return r
}
func (r *RequestBuilder) WithProxy(proxyURL string) *RequestBuilder {
r.clientProxyURL = proxyURL
return r
}
func (r *RequestBuilder) UseProxy(value bool) *RequestBuilder {
r.useClientProxy = value
return r
}
func (r *RequestBuilder) WithTimeout(timeout int) *RequestBuilder {
r.clientTimeout = timeout
return r
}
func (r *RequestBuilder) WithoutRedirects() *RequestBuilder {
r.withoutRedirects = true
return r
}
func (r *RequestBuilder) DisableHTTP2(value bool) *RequestBuilder {
r.disableHTTP2 = value
return r
}
func (r *RequestBuilder) IgnoreTLSErrors(value bool) *RequestBuilder {
r.ignoreTLSErrors = value
return r
}
func (r *RequestBuilder) ExecuteRequest(requestURL string) (*http.Response, error) {
// We get the safe ciphers
ciphers := tls.CipherSuites()
if r.ignoreTLSErrors {
// and the insecure ones if we are ignoring TLS errors. This allows to connect to badly configured servers anyway
ciphers = append(ciphers, tls.InsecureCipherSuites()...)
}
cipherSuites := []uint16{}
for _, cipher := range ciphers {
cipherSuites = append(cipherSuites, cipher.ID)
}
transport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
// Setting `DialContext` disables HTTP/2, this option forces the transport to try HTTP/2 regardless.
ForceAttemptHTTP2: true,
DialContext: (&net.Dialer{
// Default is 30s.
Timeout: 10 * time.Second,
// Default is 30s.
KeepAlive: 15 * time.Second,
}).DialContext,
// Default is 100.
MaxIdleConns: 50,
// Default is 90s.
IdleConnTimeout: 10 * time.Second,
TLSClientConfig: &tls.Config{
CipherSuites: cipherSuites,
InsecureSkipVerify: r.ignoreTLSErrors,
},
}
if r.disableHTTP2 {
transport.ForceAttemptHTTP2 = false
// https://pkg.go.dev/net/http#hdr-HTTP_2
// Programs that must disable HTTP/2 can do so by setting [Transport.TLSNextProto] (for clients) or [Server.TLSNextProto] (for servers) to a non-nil, empty map.
transport.TLSNextProto = map[string]func(string, *tls.Conn) http.RoundTripper{}
}
if r.useClientProxy && r.clientProxyURL != "" {
if proxyURL, err := url.Parse(r.clientProxyURL); err != nil {
slog.Warn("Unable to parse proxy URL",
slog.String("proxy_url", r.clientProxyURL),
slog.Any("error", err),
)
} else {
transport.Proxy = http.ProxyURL(proxyURL)
}
}
client := &http.Client{
Timeout: time.Duration(r.clientTimeout) * time.Second,
}
if r.withoutRedirects {
client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
return http.ErrUseLastResponse
}
}
client.Transport = transport
req, err := http.NewRequest("GET", requestURL, nil)
if err != nil {
return nil, err
}
req.Header = r.headers
req.Header.Set("Accept-Encoding", "br, gzip")
req.Header.Set("Accept", defaultAcceptHeader)
req.Header.Set("Connection", "close")
slog.Debug("Making outgoing request", slog.Group("request",
slog.String("method", req.Method),
slog.String("url", req.URL.String()),
slog.Any("headers", req.Header),
slog.Bool("without_redirects", r.withoutRedirects),
slog.Bool("with_proxy", r.useClientProxy),
slog.String("proxy_url", r.clientProxyURL),
slog.Bool("ignore_tls_errors", r.ignoreTLSErrors),
slog.Bool("disable_http2", r.disableHTTP2),
))
return client.Do(req)
}
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