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http.go
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http.go
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package yiigo
import (
"bytes"
"context"
"crypto/tls"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"time"
)
// defaultHTTPTimeout default http request timeout
const defaultHTTPTimeout = 10 * time.Second
// httpClientOptions http client options
type httpClientOptions struct {
dialTimeout time.Duration
dialKeepAlive time.Duration
fallbackDelay time.Duration
maxIdleConns int
maxIdleConnsPerHost int
maxConnsPerHost int
idleConnTimeout time.Duration
tlsConfig *tls.Config
tlsHandshakeTimeout time.Duration
expectContinueTimeout time.Duration
defaultTimeout time.Duration
}
// HTTPClientOption configures how we set up the http client
type HTTPClientOption interface {
apply(*httpClientOptions)
}
// funcHTTPClientOption implements http client option
type funcHTTPClientOption struct {
f func(*httpClientOptions)
}
func (fo *funcHTTPClientOption) apply(o *httpClientOptions) {
fo.f(o)
}
func newFuncHTTPOption(f func(*httpClientOptions)) *funcHTTPClientOption {
return &funcHTTPClientOption{f: f}
}
// WithHTTPDialTimeout specifies the `DialTimeout` to net.Dialer.
func WithHTTPDialTimeout(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.dialTimeout = d
})
}
// WithHTTPDialKeepAlive specifies the `KeepAlive` to net.Dialer.
func WithHTTPDialKeepAlive(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.dialKeepAlive = d
})
}
// WithHTTPDialFallbackDelay specifies the `FallbackDelay` to net.Dialer.
func WithHTTPDialFallbackDelay(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.fallbackDelay = d
})
}
// WithHTTPMaxIdleConns specifies the `MaxIdleConns` to http client.
func WithHTTPMaxIdleConns(n int) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.maxIdleConns = n
})
}
// WithHTTPMaxIdleConnsPerHost specifies the `MaxIdleConnsPerHost` to http client.
func WithHTTPMaxIdleConnsPerHost(n int) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.maxIdleConnsPerHost = n
})
}
// WithHTTPMaxConnsPerHost specifies the `MaxConnsPerHost` to http client.
func WithHTTPMaxConnsPerHost(n int) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.maxConnsPerHost = n
})
}
// WithHTTPIdleConnTimeout specifies the `IdleConnTimeout` to http client.
func WithHTTPIdleConnTimeout(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.idleConnTimeout = d
})
}
// WithHTTPTLSConfig specifies the `TLSClientConfig` to http client.
func WithHTTPTLSConfig(c *tls.Config) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.tlsConfig = c
})
}
// WithHTTPTLSHandshakeTimeout specifies the `TLSHandshakeTimeout` to http client.
func WithHTTPTLSHandshakeTimeout(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.tlsHandshakeTimeout = d
})
}
// WithHTTPExpectContinueTimeout specifies the `ExpectContinueTimeout` to http client.
func WithHTTPExpectContinueTimeout(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.expectContinueTimeout = d
})
}
// WithHTTPDefaultTimeout specifies the `DefaultTimeout` to http client.
func WithHTTPDefaultTimeout(d time.Duration) HTTPClientOption {
return newFuncHTTPOption(func(o *httpClientOptions) {
o.defaultTimeout = d
})
}
// httpRequestOptions http request options
type httpRequestOptions struct {
headers map[string]string
cookies []*http.Cookie
close bool
timeout time.Duration
zipkinSpanTags map[string]string
}
// HTTPRequestOption configures how we set up the http request
type HTTPRequestOption interface {
apply(*httpRequestOptions)
}
// funcHTTPRequestOption implements request option
type funcHTTPRequestOption struct {
f func(*httpRequestOptions)
}
func (fo *funcHTTPRequestOption) apply(o *httpRequestOptions) {
fo.f(o)
}
func newFuncHTTPRequestOption(f func(*httpRequestOptions)) *funcHTTPRequestOption {
return &funcHTTPRequestOption{f: f}
}
// WithRequestHeader specifies the header to http request.
func WithRequestHeader(key, value string) HTTPRequestOption {
return newFuncHTTPRequestOption(func(o *httpRequestOptions) {
o.headers[key] = value
})
}
// WithRequestCookies specifies the cookies to http request.
func WithRequestCookies(cookies ...*http.Cookie) HTTPRequestOption {
return newFuncHTTPRequestOption(func(o *httpRequestOptions) {
o.cookies = cookies
})
}
// WithRequestClose specifies close the connection after
// replying to this request (for servers) or after sending this
// request and reading its response (for clients).
func WithRequestClose(b bool) HTTPRequestOption {
return newFuncHTTPRequestOption(func(o *httpRequestOptions) {
o.close = b
})
}
// WithRequestTimeout specifies the timeout to http request.
func WithRequestTimeout(d time.Duration) HTTPRequestOption {
return newFuncHTTPRequestOption(func(o *httpRequestOptions) {
o.timeout = d
})
}
// WithZipkinSpanTag specifies the zipkin span tag to zipkin http request.
func WithZipkinSpanTag(key, value string) HTTPRequestOption {
return newFuncHTTPRequestOption(func(o *httpRequestOptions) {
o.zipkinSpanTags[key] = value
})
}
// HTTPClient http client
type HTTPClient struct {
client *http.Client
timeout time.Duration
}
// Get http get request
func (h *HTTPClient) Get(url string, options ...HTTPRequestOption) ([]byte, error) {
o := &httpRequestOptions{
headers: make(map[string]string),
timeout: h.timeout,
}
if len(options) > 0 {
for _, option := range options {
option.apply(o)
}
}
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return nil, err
}
// headers
if len(o.headers) > 0 {
for k, v := range o.headers {
req.Header.Set(k, v)
}
}
// cookies
if len(o.cookies) > 0 {
for _, v := range o.cookies {
req.AddCookie(v)
}
}
if o.close {
req.Close = true
}
// timeout
ctx, cancel := context.WithTimeout(req.Context(), o.timeout)
defer cancel()
resp, err := h.client.Do(req.WithContext(ctx))
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
io.Copy(ioutil.Discard, resp.Body)
return nil, fmt.Errorf("error http code: %d", resp.StatusCode)
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return b, nil
}
// Post http post request
func (h *HTTPClient) Post(url string, body []byte, options ...HTTPRequestOption) ([]byte, error) {
o := &httpRequestOptions{
headers: make(map[string]string),
timeout: h.timeout,
}
if len(options) > 0 {
for _, option := range options {
option.apply(o)
}
}
req, err := http.NewRequest("POST", url, bytes.NewReader(body))
if err != nil {
return nil, err
}
// headers
if len(o.headers) > 0 {
for k, v := range o.headers {
req.Header.Set(k, v)
}
}
// cookies
if len(o.cookies) > 0 {
for _, v := range o.cookies {
req.AddCookie(v)
}
}
if o.close {
req.Close = true
}
// timeout
ctx, cancel := context.WithTimeout(req.Context(), o.timeout)
defer cancel()
resp, err := h.client.Do(req.WithContext(ctx))
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
io.Copy(ioutil.Discard, resp.Body)
return nil, fmt.Errorf("error http code: %d", resp.StatusCode)
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
return b, nil
}
// defaultHTTPClient default http client
var defaultHTTPClient = &HTTPClient{
client: &http.Client{
Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: 30 * time.Second,
KeepAlive: 60 * time.Second,
}).DialContext,
MaxIdleConns: 0,
MaxIdleConnsPerHost: 1000,
MaxConnsPerHost: 1000,
IdleConnTimeout: 60 * time.Second,
TLSHandshakeTimeout: 10 * time.Second,
ExpectContinueTimeout: 1 * time.Second,
},
},
timeout: defaultHTTPTimeout,
}
// NewHTTPClient returns a new http client
func NewHTTPClient(options ...HTTPClientOption) *HTTPClient {
o := &httpClientOptions{
dialTimeout: 30 * time.Second,
dialKeepAlive: 60 * time.Second,
maxIdleConns: 0,
maxIdleConnsPerHost: 1000,
maxConnsPerHost: 1000,
idleConnTimeout: 60 * time.Second,
tlsHandshakeTimeout: 10 * time.Second,
expectContinueTimeout: 1 * time.Second,
defaultTimeout: defaultHTTPTimeout,
}
if len(options) > 0 {
for _, option := range options {
option.apply(o)
}
}
t := &http.Transport{
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
Timeout: o.dialTimeout,
KeepAlive: o.dialKeepAlive,
}).DialContext,
MaxConnsPerHost: o.maxConnsPerHost,
MaxIdleConnsPerHost: o.maxIdleConnsPerHost,
MaxIdleConns: o.maxIdleConns,
IdleConnTimeout: o.idleConnTimeout,
TLSClientConfig: o.tlsConfig,
TLSHandshakeTimeout: o.tlsHandshakeTimeout,
ExpectContinueTimeout: o.expectContinueTimeout,
}
c := &HTTPClient{
client: &http.Client{
Transport: t,
},
timeout: o.defaultTimeout,
}
return c
}
// HTTPGet http get request
func HTTPGet(url string, options ...HTTPRequestOption) ([]byte, error) {
return defaultHTTPClient.Get(url, options...)
}
// HTTPPost http post request
func HTTPPost(url string, body []byte, options ...HTTPRequestOption) ([]byte, error) {
return defaultHTTPClient.Post(url, body, options...)
}