mirror of https://github.com/perkeep/perkeep.git
111 lines
3.2 KiB
Go
111 lines
3.2 KiB
Go
/*
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Copyright 2014 The Perkeep Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package httputil
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import (
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"bufio"
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"fmt"
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"net/http"
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"os"
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"regexp"
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"strings"
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"go4.org/types"
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)
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// NewFakeTransport takes a map of URL to function generating a response
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// and returns an http.RoundTripper that does HTTP requests out of that.
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func NewFakeTransport(urls map[string]func() *http.Response) http.RoundTripper {
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return fakeTransport(urls)
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}
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type fakeTransport map[string]func() *http.Response
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func (m fakeTransport) RoundTrip(req *http.Request) (res *http.Response, err error) {
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urls := req.URL.String()
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fn, ok := m[urls]
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if !ok {
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return nil, fmt.Errorf("Unexpected FakeTransport URL requested: %s", urls)
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}
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return fn(), nil
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}
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// Matcher describes a regular expression and the function that will
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// be used if that regular expression is matched.
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type Matcher struct {
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URLRegex string // will be compiled and matched against URLs
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Fn func() *http.Response // function that will be run if URLRegex matches
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}
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// NewRegexpFakeTransport takes a slice of Matchers and returns an
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// http.RoundTripper that will apply the function associated with the
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// first UrlRegex that matches.
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func NewRegexpFakeTransport(allMatchers []*Matcher) (http.RoundTripper, error) {
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var result regexpFakeTransport = []*regexPair{}
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for _, matcher := range allMatchers {
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r, err := regexp.Compile(matcher.URLRegex)
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if err != nil {
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return nil, err
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}
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pair := regexPair{r, matcher.Fn}
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result = append(result, &pair)
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}
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return result, nil
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}
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type regexPair struct {
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r *regexp.Regexp
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fn func() *http.Response
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}
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type regexpFakeTransport []*regexPair
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func (rft regexpFakeTransport) RoundTrip(req *http.Request) (*http.Response, error) {
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s := req.URL.String()
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for _, p := range rft {
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if p.r.MatchString(s) {
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return p.fn(), nil
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}
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}
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return nil, fmt.Errorf("Unexpected RegexpFakeTransport URL requested: %s", s)
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}
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// FileResponder returns an HTTP response generator that returns the
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// contents of the named file.
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func FileResponder(filename string) func() *http.Response {
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return func() *http.Response {
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f, err := os.Open(filename)
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if err != nil {
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return &http.Response{StatusCode: 404, Status: "404 Not Found", Body: types.EmptyBody}
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}
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return &http.Response{StatusCode: 200, Status: "200 OK", Body: f}
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}
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}
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// StaticResponder returns an HTTP response generator that parses res
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// for an entire HTTP response, including headers and body.
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func StaticResponder(res string) func() *http.Response {
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_, err := http.ReadResponse(bufio.NewReader(strings.NewReader(res)), nil)
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if err != nil {
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panic("Invalid response given to StaticResponder: " + err.Error())
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}
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return func() *http.Response {
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res, _ := http.ReadResponse(bufio.NewReader(strings.NewReader(res)), nil)
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return res
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}
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}
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