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interceptor.go
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interceptor.go
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package stubs
import (
"bytes"
//"fmt"
"io/ioutil"
//"log"
"net/http"
"net/url"
"time"
"github.com/pubnub/go/tests/helpers"
)
type Interceptor struct {
Transport *interceptTransport
}
func NewInterceptor() *Interceptor {
return &Interceptor{
Transport: &interceptTransport{},
}
}
func (i *Interceptor) AddStub(stub *Stub) {
i.Transport.AddStub(stub)
}
func (i *Interceptor) GetClient() *http.Client {
return &http.Client{
Transport: i.Transport,
}
}
type Stub struct {
Method string
Path string
Query string
ResponseBody string
ResponseStatusCode int
MixedPathPositions []int
IgnoreQueryKeys []string
MixedQueryKeys []string
Hang bool
}
func (s *Stub) Match(req *http.Request) bool {
if s.Hang {
time.Sleep(1000 * time.Second)
}
if s.Method != req.Method {
//log.Printf("Methods are not equal: %s != %s\n", s.Method, req.Method)
return false
}
parsedUrl, _ := req.URL.Parse(req.URL.String())
if !helpers.PathsEqual(s.Path, parsedUrl.EscapedPath(), s.MixedPathPositions) {
return false
}
expectedQuery, _ := url.ParseQuery(s.Query)
actualQuery := req.URL.Query()
//fmt.Println("ex", expectedQuery, "\nact", actualQuery, "\nignore",
// s.IgnoreQueryKeys)
if !helpers.QueriesEqual(&expectedQuery,
&actualQuery,
s.IgnoreQueryKeys,
s.MixedQueryKeys) {
//fmt.Println("NOT EQUAL")
return false
}
return true
}
type interceptTransport struct {
Stubs []*Stub
}
func (i *interceptTransport) RoundTrip(req *http.Request) (*http.Response,
error) {
//fmt.Println(req.URL)
for _, v := range i.Stubs {
if v.Match(req) {
var statusString string
switch v.ResponseStatusCode {
case 200:
statusString = "200 OK"
case 403:
statusString = "403 Forbidden"
default:
statusString = ""
}
return &http.Response{
Status: statusString,
StatusCode: v.ResponseStatusCode,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: req,
Header: http.Header{"Content-Length": {"256"}},
TransferEncoding: nil,
Close: true,
Body: ioutil.NopCloser(bytes.NewBufferString(v.ResponseBody)),
ContentLength: 256,
}, nil
}
}
// Nothing was found
return &http.Response{
Status: "530 No stub matched",
StatusCode: 530,
Proto: "HTTP/1.0",
ProtoMajor: 1,
ProtoMinor: 0,
Request: req,
TransferEncoding: nil,
Body: ioutil.NopCloser(bytes.NewBufferString("No Stub Matched")),
Close: true,
ContentLength: 256,
}, nil
}
func (i *interceptTransport) AddStub(stub *Stub) {
i.Stubs = append(i.Stubs, stub)
}