File size: 3,871 Bytes
ca7217f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 | package fetch
import (
"crypto/tls"
"io"
"net/http"
"net/http/cookiejar"
"time"
"github.com/hashicorp/go-cleanhttp"
"github.com/hashicorp/go-retryablehttp"
"github.com/metatube-community/metatube-sdk-go/common/random"
"github.com/metatube-community/metatube-sdk-go/errors"
)
var DefaultFetcher = Default(&Config{RandomUserAgent: true})
type Config struct {
// Set User-Agent Header.
UserAgent string
// Set Referer Header.
Referer string
// Enable cookies.
EnableCookies bool
// Use random User-Agent.
RandomUserAgent bool
// Return error when status is not OK.
RaiseForStatus bool
// HTTP Request timeout.
Timeout time.Duration
// Custom HTTP Transport.
Transport http.RoundTripper
// Skip TLS verification. Applies only
// to *http.Transport based transport.
SkipVerify bool
}
type Fetcher struct {
client *http.Client
config *Config
}
func New(c *http.Client, cfg *Config) *Fetcher {
if cfg.RandomUserAgent {
// assign a random user-agent.
cfg.UserAgent = random.UserAgent()
}
if cfg.EnableCookies {
jar, _ := cookiejar.New(nil)
c.Jar = jar // assign a cookie jar.
}
return &Fetcher{
client: c,
config: cfg,
}
}
func Default(cfg *Config) *Fetcher {
if cfg == nil /* init if nil */ {
cfg = new(Config)
}
// Enable status check by default.
cfg.RaiseForStatus = true
// Enable random UA if not set.
if cfg.UserAgent == "" {
cfg.RandomUserAgent = true
}
c := &retryablehttp.Client{
HTTPClient: cleanhttp.DefaultPooledClient(),
RetryWaitMin: 1 * time.Second,
RetryWaitMax: 3 * time.Second,
RetryMax: 3,
CheckRetry: retryablehttp.DefaultRetryPolicy,
Backoff: retryablehttp.DefaultBackoff,
}
if cfg.Timeout > time.Second {
c.HTTPClient.Timeout = cfg.Timeout
}
if cfg.Transport != nil {
c.HTTPClient.Transport = cfg.Transport
}
if cfg.SkipVerify {
if transport, ok := c.HTTPClient.Transport.(*http.Transport); ok {
if transport.TLSClientConfig == nil {
// init TLS config if is nil.
transport.TLSClientConfig = &tls.Config{}
}
transport.TLSClientConfig.InsecureSkipVerify = true
}
}
return New(c.StandardClient(), cfg)
}
func (f *Fetcher) Fetch(url string) (resp *http.Response, err error) {
return f.Get(url)
}
func (f *Fetcher) Get(url string, opts ...Option) (resp *http.Response, err error) {
return f.Request(http.MethodGet, url, nil, opts...)
}
func (f *Fetcher) Post(url string, body io.Reader, opts ...Option) (resp *http.Response, err error) {
return f.Request(http.MethodPost, url, body, opts...)
}
func (f *Fetcher) Request(method, url string, body io.Reader, opts ...Option) (resp *http.Response, err error) {
var req *http.Request
if req, err = http.NewRequest(method, url, body); err != nil {
return
}
c := &Context{
req: req,
Config: *f.config, /* clone */
}
// compose options.
var options []Option
if c.UserAgent != "" {
options = append(options, WithUserAgent(c.UserAgent))
}
if c.Referer != "" {
options = append(options, WithReferer(c.Referer))
}
// apply options.
for _, option := range append(options, opts...) {
option.apply(c)
}
// make HTTP request.
if resp, err = f.client.Do(req); err != nil {
return
}
if c.RaiseForStatus && resp.StatusCode != http.StatusOK {
defer resp.Body.Close()
return nil, errors.FromCode(resp.StatusCode)
}
return
}
func Fetch(url string) (*http.Response, error) {
return DefaultFetcher.Fetch(url)
}
func Get(url string, opts ...Option) (*http.Response, error) {
return DefaultFetcher.Get(url, opts...)
}
func Post(url string, body io.Reader, opts ...Option) (*http.Response, error) {
return DefaultFetcher.Post(url, body, opts...)
}
func Request(method, url string, body io.Reader, opts ...Option) (*http.Response, error) {
return DefaultFetcher.Request(method, url, body, opts...)
}
var (
_ = Fetch
_ = Get
_ = Post
_ = Request
)
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