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@@ -0,0 +1,639 @@
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+package utils
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+
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+import (
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+ "bytes"
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+ "compress/gzip"
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+ "context"
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+ "crypto/tls"
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+ "encoding/json"
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+ "encoding/xml"
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+ "io"
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+ "io/ioutil"
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+ "log"
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+ "mime/multipart"
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+ "net"
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+ "net/http"
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+ "net/http/cookiejar"
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+ "net/http/httputil"
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+ "net/url"
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+ "os"
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+ "path"
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+ "strings"
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+ "sync"
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+ "time"
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+
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+ "gopkg.in/yaml.v2"
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+)
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+
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+var defaultSetting = HTTPSettings{
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+ UserAgent: "beegoServer",
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+ ConnectTimeout: 60 * time.Second,
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+ ReadWriteTimeout: 60 * time.Second,
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+ Gzip: true,
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+ DumpBody: true,
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+}
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+
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+var defaultCookieJar http.CookieJar
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+var settingMutex sync.Mutex
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+
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+// it will be the last filter and execute request.Do
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+var doRequestFilter = func(ctx context.Context, req *HTTPRequest) (*http.Response, error) {
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+ return req.doRequest(ctx)
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+}
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+
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+// createDefaultCookie creates a global cookiejar to store cookies.
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+func createDefaultCookie() {
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+ settingMutex.Lock()
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+ defer settingMutex.Unlock()
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+ defaultCookieJar, _ = cookiejar.New(nil)
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+}
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+
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+// SetDefaultSetting overwrites default settings
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+func SetDefaultSetting(setting HTTPSettings) {
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+ settingMutex.Lock()
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+ defer settingMutex.Unlock()
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+ defaultSetting = setting
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+}
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+
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+// NewRequest returns *HTTPRequest with specific method
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+func NewRequest(rawurl, method string) *HTTPRequest {
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+ var resp http.Response
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+ u, err := url.Parse(rawurl)
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+ if err != nil {
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+ log.Println("Httplib:", err)
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+ }
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+ req := http.Request{
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+ URL: u,
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+ Method: method,
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+ Header: make(http.Header),
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+ Proto: "HTTP/1.1",
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+ ProtoMajor: 1,
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+ ProtoMinor: 1,
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+ }
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+ return &HTTPRequest{
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+ url: rawurl,
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+ req: &req,
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+ params: map[string][]string{},
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+ files: map[string]string{},
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+ setting: defaultSetting,
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+ resp: &resp,
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+ }
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+}
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+
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+// Get returns *HTTPRequest with GET method.
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+func Get(url string) *HTTPRequest {
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+ return NewRequest(url, "GET")
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+}
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+
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+// Post returns *HTTPRequest with POST method.
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+func Post(url string) *HTTPRequest {
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+ return NewRequest(url, "POST")
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+}
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+
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+// Put returns *HTTPRequest with PUT method.
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+func Put(url string) *HTTPRequest {
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+ return NewRequest(url, "PUT")
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+}
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+
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+// Delete returns *HTTPRequest DELETE method.
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+func Delete(url string) *HTTPRequest {
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+ return NewRequest(url, "DELETE")
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+}
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+
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+// Head returns *HTTPRequest with HEAD method.
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+func Head(url string) *HTTPRequest {
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+ return NewRequest(url, "HEAD")
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+}
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+
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+// HTTPSettings is the http.Client setting
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+type HTTPSettings struct {
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+ ShowDebug bool
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+ UserAgent string
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+ ConnectTimeout time.Duration
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+ ReadWriteTimeout time.Duration
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+ TLSClientConfig *tls.Config
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+ Proxy func(*http.Request) (*url.URL, error)
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+ Transport http.RoundTripper
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+ CheckRedirect func(req *http.Request, via []*http.Request) error
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+ EnableCookie bool
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+ Gzip bool
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+ DumpBody bool
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+ Retries int // if set to -1 means will retry forever
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+ RetryDelay time.Duration
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+}
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+
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+// HTTPRequest provides more useful methods than http.Request for requesting a url.
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+type HTTPRequest struct {
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+ url string
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+ req *http.Request
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+ params map[string][]string
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+ files map[string]string
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+ setting HTTPSettings
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+ resp *http.Response
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+ body []byte
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+ dump []byte
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+}
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+
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+// GetRequest returns the request object
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+func (b *HTTPRequest) GetRequest() *http.Request {
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+ return b.req
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+}
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+
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+// Setting changes request settings
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+func (b *HTTPRequest) Setting(setting HTTPSettings) *HTTPRequest {
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+ b.setting = setting
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+ return b
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+}
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+
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+// SetBasicAuth sets the request's Authorization header to use HTTP Basic Authentication with the provided username and password.
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+func (b *HTTPRequest) SetBasicAuth(username, password string) *HTTPRequest {
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+ b.req.SetBasicAuth(username, password)
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+ return b
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+}
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+
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+// SetEnableCookie sets enable/disable cookiejar
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+func (b *HTTPRequest) SetEnableCookie(enable bool) *HTTPRequest {
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+ b.setting.EnableCookie = enable
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+ return b
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+}
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+
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+// SetUserAgent sets User-Agent header field
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+func (b *HTTPRequest) SetUserAgent(useragent string) *HTTPRequest {
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+ b.setting.UserAgent = useragent
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+ return b
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+}
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+
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+// Debug sets show debug or not when executing request.
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+func (b *HTTPRequest) Debug(isdebug bool) *HTTPRequest {
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+ b.setting.ShowDebug = isdebug
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+ return b
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+}
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+
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+// Retries sets Retries times.
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+// default is 0 (never retry)
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+// -1 retry indefinitely (forever)
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+// Other numbers specify the exact retry amount
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+func (b *HTTPRequest) Retries(times int) *HTTPRequest {
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+ b.setting.Retries = times
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+ return b
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+}
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+
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+// RetryDelay sets the time to sleep between reconnection attempts
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+func (b *HTTPRequest) RetryDelay(delay time.Duration) *HTTPRequest {
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+ b.setting.RetryDelay = delay
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+ return b
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+}
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+
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+// DumpBody sets the DumbBody field
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+func (b *HTTPRequest) DumpBody(isdump bool) *HTTPRequest {
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+ b.setting.DumpBody = isdump
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+ return b
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+}
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+
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+// DumpRequest returns the DumpRequest
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+func (b *HTTPRequest) DumpRequest() []byte {
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+ return b.dump
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+}
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+
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+// SetTimeout sets connect time out and read-write time out for BeegoRequest.
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+func (b *HTTPRequest) SetTimeout(connectTimeout, readWriteTimeout time.Duration) *HTTPRequest {
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+ b.setting.ConnectTimeout = connectTimeout
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+ b.setting.ReadWriteTimeout = readWriteTimeout
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+ return b
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+}
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+
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+// SetTLSClientConfig sets TLS connection configuration if visiting HTTPS url.
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+func (b *HTTPRequest) SetTLSClientConfig(config *tls.Config) *HTTPRequest {
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+ b.setting.TLSClientConfig = config
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+ return b
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+}
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+
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+// Header adds header item string in request.
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+func (b *HTTPRequest) Header(key, value string) *HTTPRequest {
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+ b.req.Header.Set(key, value)
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+ return b
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+}
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+
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+// SetHost set the request host
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+func (b *HTTPRequest) SetHost(host string) *HTTPRequest {
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+ b.req.Host = host
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+ return b
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+}
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+
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+// SetProtocolVersion sets the protocol version for incoming requests.
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+// Client requests always use HTTP/1.1.
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+func (b *HTTPRequest) SetProtocolVersion(vers string) *HTTPRequest {
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+ if len(vers) == 0 {
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+ vers = "HTTP/1.1"
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+ }
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+
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+ major, minor, ok := http.ParseHTTPVersion(vers)
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+ if ok {
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+ b.req.Proto = vers
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+ b.req.ProtoMajor = major
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+ b.req.ProtoMinor = minor
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+ }
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+
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+ return b
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+}
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+
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+// SetCookie adds a cookie to the request.
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+func (b *HTTPRequest) SetCookie(cookie *http.Cookie) *HTTPRequest {
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+ b.req.Header.Add("Cookie", cookie.String())
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+ return b
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+}
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+
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+// SetTransport sets the transport field
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+func (b *HTTPRequest) SetTransport(transport http.RoundTripper) *HTTPRequest {
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+ b.setting.Transport = transport
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+ return b
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+}
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+
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+// SetProxy sets the HTTP proxy
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+// example:
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+//
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+// func(req *http.Request) (*url.URL, error) {
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+// u, _ := url.ParseRequestURI("http://127.0.0.1:8118")
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+// return u, nil
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+// }
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+func (b *HTTPRequest) SetProxy(proxy func(*http.Request) (*url.URL, error)) *HTTPRequest {
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+ b.setting.Proxy = proxy
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+ return b
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+}
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+
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+// SetCheckRedirect specifies the policy for handling redirects.
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+//
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+// If CheckRedirect is nil, the Client uses its default policy,
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+// which is to stop after 10 consecutive requests.
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+func (b *HTTPRequest) SetCheckRedirect(redirect func(req *http.Request, via []*http.Request) error) *HTTPRequest {
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+ b.setting.CheckRedirect = redirect
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+ return b
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+}
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+
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+// Param adds query param in to request.
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+// params build query string as ?key1=value1&key2=value2...
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+func (b *HTTPRequest) Param(key, value string) *HTTPRequest {
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+ if param, ok := b.params[key]; ok {
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+ b.params[key] = append(param, value)
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+ } else {
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+ b.params[key] = []string{value}
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+ }
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+ return b
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+}
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+
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+// PostFile adds a post file to the request
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+func (b *HTTPRequest) PostFile(formname, filename string) *HTTPRequest {
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+ b.files[formname] = filename
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+ return b
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+}
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+
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+// Body adds request raw body.
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+// Supports string and []byte.
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+func (b *HTTPRequest) Body(data interface{}) *HTTPRequest {
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+ switch t := data.(type) {
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+ case string:
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+ bf := bytes.NewBufferString(t)
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+ b.req.Body = ioutil.NopCloser(bf)
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+ b.req.ContentLength = int64(len(t))
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+ case []byte:
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+ bf := bytes.NewBuffer(t)
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+ b.req.Body = ioutil.NopCloser(bf)
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+ b.req.ContentLength = int64(len(t))
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+ }
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+ return b
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+}
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+
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+// XMLBody adds the request raw body encoded in XML.
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+func (b *HTTPRequest) XMLBody(obj interface{}) (*HTTPRequest, error) {
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+ if b.req.Body == nil && obj != nil {
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+ byts, err := xml.Marshal(obj)
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+ if err != nil {
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+ return b, err
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+ }
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+ b.req.Body = ioutil.NopCloser(bytes.NewReader(byts))
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+ b.req.ContentLength = int64(len(byts))
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+ b.req.Header.Set("Content-Type", "application/xml")
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+ }
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+ return b, nil
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+}
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+
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+// YAMLBody adds the request raw body encoded in YAML.
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+func (b *HTTPRequest) YAMLBody(obj interface{}) (*HTTPRequest, error) {
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+ if b.req.Body == nil && obj != nil {
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+ byts, err := yaml.Marshal(obj)
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+ if err != nil {
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+ return b, err
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+ }
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+ b.req.Body = ioutil.NopCloser(bytes.NewReader(byts))
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+ b.req.ContentLength = int64(len(byts))
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+ b.req.Header.Set("Content-Type", "application/x+yaml")
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+ }
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+ return b, nil
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+}
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+
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+// JSONBody adds the request raw body encoded in JSON.
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+func (b *HTTPRequest) JSONBody(obj interface{}) (*HTTPRequest, error) {
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+ if b.req.Body == nil && obj != nil {
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+ byts, err := json.Marshal(obj)
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+ if err != nil {
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+ return b, err
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+ }
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+ b.req.Body = ioutil.NopCloser(bytes.NewReader(byts))
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+ b.req.ContentLength = int64(len(byts))
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+ b.req.Header.Set("Content-Type", "application/json")
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+ }
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+ return b, nil
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+}
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+
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+func (b *HTTPRequest) buildURL(paramBody string) {
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+ // build GET url with query string
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+ if b.req.Method == "GET" && len(paramBody) > 0 {
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+ if strings.Contains(b.url, "?") {
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+ b.url += "&" + paramBody
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+ } else {
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+ b.url = b.url + "?" + paramBody
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+ }
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+ return
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+ }
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+
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+ // build POST/PUT/PATCH url and body
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+ if (b.req.Method == "POST" || b.req.Method == "PUT" || b.req.Method == "PATCH" || b.req.Method == "DELETE") && b.req.Body == nil {
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+ // with files
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+ if len(b.files) > 0 {
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+ pr, pw := io.Pipe()
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+ bodyWriter := multipart.NewWriter(pw)
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+ go func() {
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+ for formname, filename := range b.files {
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+ fileWriter, err := bodyWriter.CreateFormFile(formname, filename)
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+ if err != nil {
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+ log.Println("Httplib:", err)
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+ }
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+ fh, err := os.Open(filename)
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+ if err != nil {
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+ log.Println("Httplib:", err)
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+ }
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+ // iocopy
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+ _, err = io.Copy(fileWriter, fh)
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+ fh.Close()
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+ if err != nil {
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+ log.Println("Httplib:", err)
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+ }
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+ }
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+ for k, v := range b.params {
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+ for _, vv := range v {
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+ bodyWriter.WriteField(k, vv)
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+ }
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+ }
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+ bodyWriter.Close()
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+ pw.Close()
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+ }()
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+ b.Header("Content-Type", bodyWriter.FormDataContentType())
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+ b.req.Body = ioutil.NopCloser(pr)
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+ b.Header("Transfer-Encoding", "chunked")
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+ return
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+ }
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+
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+ // with params
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+ if len(paramBody) > 0 {
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+ b.Header("Content-Type", "application/x-www-form-urlencoded")
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+ b.Body(paramBody)
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+ }
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+ }
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+}
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+
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+func (b *HTTPRequest) getResponse() (*http.Response, error) {
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+ if b.resp.StatusCode != 0 {
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+ return b.resp, nil
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+ }
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+ resp, err := b.DoRequest()
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+ if err != nil {
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+ return nil, err
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+ }
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+ b.resp = resp
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+ return resp, nil
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+}
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+
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+// DoRequest executes client.Do
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+func (b *HTTPRequest) DoRequest() (resp *http.Response, err error) {
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+ return b.DoRequestWithCtx(context.Background())
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+}
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+
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+func (b *HTTPRequest) DoRequestWithCtx(ctx context.Context) (resp *http.Response, err error) {
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+ root := doRequestFilter
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+ return root(ctx, b)
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+}
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+
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+func (b *HTTPRequest) doRequest(ctx context.Context) (resp *http.Response, err error) {
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+ var paramBody string
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+ if len(b.params) > 0 {
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+ var buf bytes.Buffer
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+ for k, v := range b.params {
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+ for _, vv := range v {
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|
+ buf.WriteString(url.QueryEscape(k))
|
|
|
+ buf.WriteByte('=')
|
|
|
+ buf.WriteString(url.QueryEscape(vv))
|
|
|
+ buf.WriteByte('&')
|
|
|
+ }
|
|
|
+ }
|
|
|
+ paramBody = buf.String()
|
|
|
+ paramBody = paramBody[0 : len(paramBody)-1]
|
|
|
+ }
|
|
|
+
|
|
|
+ b.buildURL(paramBody)
|
|
|
+ urlParsed, err := url.Parse(b.url)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+
|
|
|
+ b.req.URL = urlParsed
|
|
|
+
|
|
|
+ trans := b.setting.Transport
|
|
|
+
|
|
|
+ if trans == nil {
|
|
|
+ // create default transport
|
|
|
+ trans = &http.Transport{
|
|
|
+ TLSClientConfig: b.setting.TLSClientConfig,
|
|
|
+ Proxy: b.setting.Proxy,
|
|
|
+ Dial: TimeoutDialer(b.setting.ConnectTimeout, b.setting.ReadWriteTimeout),
|
|
|
+ MaxIdleConnsPerHost: 100,
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ // if b.transport is *http.Transport then set the settings.
|
|
|
+ if t, ok := trans.(*http.Transport); ok {
|
|
|
+ if t.TLSClientConfig == nil {
|
|
|
+ t.TLSClientConfig = b.setting.TLSClientConfig
|
|
|
+ }
|
|
|
+ if t.Proxy == nil {
|
|
|
+ t.Proxy = b.setting.Proxy
|
|
|
+ }
|
|
|
+ if t.Dial == nil {
|
|
|
+ t.Dial = TimeoutDialer(b.setting.ConnectTimeout, b.setting.ReadWriteTimeout)
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ var jar http.CookieJar
|
|
|
+ if b.setting.EnableCookie {
|
|
|
+ if defaultCookieJar == nil {
|
|
|
+ createDefaultCookie()
|
|
|
+ }
|
|
|
+ jar = defaultCookieJar
|
|
|
+ }
|
|
|
+
|
|
|
+ client := &http.Client{
|
|
|
+ Transport: trans,
|
|
|
+ Jar: jar,
|
|
|
+ }
|
|
|
+
|
|
|
+ if b.setting.UserAgent != "" && b.req.Header.Get("User-Agent") == "" {
|
|
|
+ b.req.Header.Set("User-Agent", b.setting.UserAgent)
|
|
|
+ }
|
|
|
+
|
|
|
+ if b.setting.CheckRedirect != nil {
|
|
|
+ client.CheckRedirect = b.setting.CheckRedirect
|
|
|
+ }
|
|
|
+
|
|
|
+ if b.setting.ShowDebug {
|
|
|
+ dump, err := httputil.DumpRequest(b.req, b.setting.DumpBody)
|
|
|
+ if err != nil {
|
|
|
+ log.Println(err.Error())
|
|
|
+ }
|
|
|
+ b.dump = dump
|
|
|
+ }
|
|
|
+ // retries default value is 0, it will run once.
|
|
|
+ // retries equal to -1, it will run forever until success
|
|
|
+ // retries is setted, it will retries fixed times.
|
|
|
+ // Sleeps for a 400ms inbetween calls to reduce spam
|
|
|
+ for i := 0; b.setting.Retries == -1 || i <= b.setting.Retries; i++ {
|
|
|
+ resp, err = client.Do(b.req)
|
|
|
+ if err == nil {
|
|
|
+ break
|
|
|
+ }
|
|
|
+ time.Sleep(b.setting.RetryDelay)
|
|
|
+ }
|
|
|
+ return resp, err
|
|
|
+}
|
|
|
+
|
|
|
+// String returns the body string in response.
|
|
|
+// Calls Response inner.
|
|
|
+func (b *HTTPRequest) String() (string, error) {
|
|
|
+ data, err := b.Bytes()
|
|
|
+ if err != nil {
|
|
|
+ return "", err
|
|
|
+ }
|
|
|
+
|
|
|
+ return string(data), nil
|
|
|
+}
|
|
|
+
|
|
|
+// Bytes returns the body []byte in response.
|
|
|
+// Calls Response inner.
|
|
|
+func (b *HTTPRequest) Bytes() ([]byte, error) {
|
|
|
+ if b.body != nil {
|
|
|
+ return b.body, nil
|
|
|
+ }
|
|
|
+ resp, err := b.getResponse()
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+ if resp.Body == nil {
|
|
|
+ return nil, nil
|
|
|
+ }
|
|
|
+ defer resp.Body.Close()
|
|
|
+ if b.setting.Gzip && resp.Header.Get("Content-Encoding") == "gzip" {
|
|
|
+ reader, err := gzip.NewReader(resp.Body)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+ b.body, err = ioutil.ReadAll(reader)
|
|
|
+ return b.body, err
|
|
|
+ }
|
|
|
+ b.body, err = ioutil.ReadAll(resp.Body)
|
|
|
+ return b.body, err
|
|
|
+}
|
|
|
+
|
|
|
+// ToFile saves the body data in response to one file.
|
|
|
+// Calls Response inner.
|
|
|
+func (b *HTTPRequest) ToFile(filename string) error {
|
|
|
+ resp, err := b.getResponse()
|
|
|
+ if err != nil {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+ if resp.Body == nil {
|
|
|
+ return nil
|
|
|
+ }
|
|
|
+ defer resp.Body.Close()
|
|
|
+ err = pathExistAndMkdir(filename)
|
|
|
+ if err != nil {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+ f, err := os.Create(filename)
|
|
|
+ if err != nil {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+ defer f.Close()
|
|
|
+ _, err = io.Copy(f, resp.Body)
|
|
|
+ return err
|
|
|
+}
|
|
|
+
|
|
|
+// Check if the file directory exists. If it doesn't then it's created
|
|
|
+func pathExistAndMkdir(filename string) (err error) {
|
|
|
+ filename = path.Dir(filename)
|
|
|
+ _, err = os.Stat(filename)
|
|
|
+ if err == nil {
|
|
|
+ return nil
|
|
|
+ }
|
|
|
+ if os.IsNotExist(err) {
|
|
|
+ err = os.MkdirAll(filename, os.ModePerm)
|
|
|
+ if err == nil {
|
|
|
+ return nil
|
|
|
+ }
|
|
|
+ }
|
|
|
+ return err
|
|
|
+}
|
|
|
+
|
|
|
+// ToJSON returns the map that marshals from the body bytes as json in response.
|
|
|
+// Calls Response inner.
|
|
|
+func (b *HTTPRequest) ToJSON(v interface{}) error {
|
|
|
+ data, err := b.Bytes()
|
|
|
+ if err != nil {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+ return json.Unmarshal(data, v)
|
|
|
+}
|
|
|
+
|
|
|
+// ToXML returns the map that marshals from the body bytes as xml in response .
|
|
|
+// Calls Response inner.
|
|
|
+func (b *HTTPRequest) ToXML(v interface{}) error {
|
|
|
+ data, err := b.Bytes()
|
|
|
+ if err != nil {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+ return xml.Unmarshal(data, v)
|
|
|
+}
|
|
|
+
|
|
|
+// ToYAML returns the map that marshals from the body bytes as yaml in response .
|
|
|
+// Calls Response inner.
|
|
|
+func (b *HTTPRequest) ToYAML(v interface{}) error {
|
|
|
+ data, err := b.Bytes()
|
|
|
+ if err != nil {
|
|
|
+ return err
|
|
|
+ }
|
|
|
+ return yaml.Unmarshal(data, v)
|
|
|
+}
|
|
|
+
|
|
|
+// Response executes request client gets response manually.
|
|
|
+func (b *HTTPRequest) Response() (*http.Response, error) {
|
|
|
+ return b.getResponse()
|
|
|
+}
|
|
|
+
|
|
|
+// TimeoutDialer returns functions of connection dialer with timeout settings for http.Transport Dial field.
|
|
|
+func TimeoutDialer(cTimeout time.Duration, rwTimeout time.Duration) func(net, addr string) (c net.Conn, err error) {
|
|
|
+ return func(netw, addr string) (net.Conn, error) {
|
|
|
+ conn, err := net.DialTimeout(netw, addr, cTimeout)
|
|
|
+ if err != nil {
|
|
|
+ return nil, err
|
|
|
+ }
|
|
|
+ err = conn.SetDeadline(time.Now().Add(rwTimeout))
|
|
|
+ return conn, err
|
|
|
+ }
|
|
|
+}
|
double.huang