mirror of
https://github.com/caddyserver/caddy.git
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634 lines
20 KiB
Go
634 lines
20 KiB
Go
// Copyright 2015 Light Code Labs, LLC
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package staticfiles
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import (
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"context"
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"errors"
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"io/ioutil"
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"net/http"
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"net/http/httptest"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"testing"
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"time"
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"github.com/mholt/caddy"
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)
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// TestServeHTTP covers positive scenarios when serving files.
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func TestServeHTTP(t *testing.T) {
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tmpWebRootDir := beforeServeHTTPTest(t)
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defer afterServeHTTPTest(t, tmpWebRootDir)
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fileserver := FileServer{
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Root: http.Dir(filepath.Join(tmpWebRootDir, webrootName)),
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Hide: []string{"dir/hidden.html"},
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IndexPages: DefaultIndexPages,
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}
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movedPermanently := "Moved Permanently"
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tests := []struct {
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url string
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stripPathPrefix string // for when sites are defined with a path (e.g. "example.com/foo/")
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acceptEncoding string
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expectedLocation string
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expectedStatus int
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expectedBodyContent string
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expectedEtag string
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expectedVary string
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expectedEncoding string
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expectedContentLength string
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}{
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// Test 0 - access without any path
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{
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url: "https://foo",
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expectedStatus: http.StatusNotFound,
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},
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// Test 1 - access root (without index.html)
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{
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url: "https://foo/",
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expectedStatus: http.StatusNotFound,
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},
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// Test 2 - access existing file
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{
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url: "https://foo/file1.html",
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expectedStatus: http.StatusOK,
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expectedBodyContent: testFiles[webrootFile1HTML],
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expectedEtag: `"2n9cj"`,
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expectedContentLength: strconv.Itoa(len(testFiles[webrootFile1HTML])),
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},
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// Test 3 - access folder with index file with trailing slash
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{
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url: "https://foo/dirwithindex/",
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expectedStatus: http.StatusOK,
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expectedBodyContent: testFiles[webrootDirwithindexIndexHTML],
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expectedEtag: `"2n9cw"`,
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expectedContentLength: strconv.Itoa(len(testFiles[webrootDirwithindexIndexHTML])),
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},
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// Test 4 - access folder with index file without trailing slash
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{
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url: "https://foo/dirwithindex",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/dirwithindex/",
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expectedBodyContent: movedPermanently,
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},
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// Test 5 - access folder without index file
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{
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url: "https://foo/dir/",
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expectedStatus: http.StatusNotFound,
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},
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// Test 6 - access folder without trailing slash
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{
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url: "https://foo/dir",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/dir/",
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expectedBodyContent: movedPermanently,
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},
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// Test 7 - access file with trailing slash
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{
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url: "https://foo/file1.html/",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/file1.html",
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expectedBodyContent: movedPermanently,
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},
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// Test 8 - access not existing path
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{
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url: "https://foo/not_existing",
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expectedStatus: http.StatusNotFound,
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},
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// Test 9 - access a file, marked as hidden
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{
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url: "https://foo/dir/hidden.html",
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expectedStatus: http.StatusNotFound,
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},
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// Test 10 - access an index file directly
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{
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url: "https://foo/dirwithindex/index.html",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/dirwithindex/",
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},
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// Test 11 - access an index file with a trailing slash
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{
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url: "https://foo/dirwithindex/index.html/",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/dirwithindex/",
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},
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// Test 12 - send a request with query params
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{
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url: "https://foo/dir?param1=val",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/dir/?param1=val",
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expectedBodyContent: movedPermanently,
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},
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// Test 13 - attempt to bypass hidden file
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{
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url: "https://foo/dir/hidden.html%20",
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expectedStatus: http.StatusNotFound,
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},
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// Test 14 - attempt to bypass hidden file
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{
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url: "https://foo/dir/hidden.html.",
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expectedStatus: http.StatusNotFound,
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},
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// Test 15 - attempt to bypass hidden file
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{
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url: "https://foo/dir/hidden.html.%20",
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expectedStatus: http.StatusNotFound,
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},
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// Test 16 - attempt to bypass hidden file
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{
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url: "https://foo/dir/hidden.html%20.",
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acceptEncoding: "br, gzip",
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expectedStatus: http.StatusNotFound,
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},
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// Test 17 - serve another file with same name as hidden file.
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{
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url: "https://foo/hidden.html",
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expectedStatus: http.StatusNotFound,
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},
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// Test 18 - try to get below the root directory.
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{
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url: "https://foo/../unreachable.html",
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expectedStatus: http.StatusNotFound,
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},
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// Test 19 - try to get below the root directory (encoded slashes).
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{
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url: "https://foo/..%2funreachable.html",
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expectedStatus: http.StatusNotFound,
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},
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// Test 20 - try to get pre-gzipped file.
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{
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url: "https://foo/sub/gzipped.html",
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acceptEncoding: "gzip",
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expectedStatus: http.StatusOK,
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expectedBodyContent: testFiles[webrootSubGzippedHTMLGz],
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expectedEtag: `"2n9ch"`,
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expectedVary: "Accept-Encoding",
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expectedEncoding: "gzip",
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expectedContentLength: strconv.Itoa(len(testFiles[webrootSubGzippedHTMLGz])),
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},
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// Test 21 - try to get pre-brotli encoded file.
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{
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url: "https://foo/sub/brotli.html",
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acceptEncoding: "br,gzip",
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expectedStatus: http.StatusOK,
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expectedBodyContent: testFiles[webrootSubBrotliHTMLBr],
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expectedEtag: `"2n9cg"`,
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expectedVary: "Accept-Encoding",
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expectedEncoding: "br",
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expectedContentLength: strconv.Itoa(len(testFiles[webrootSubBrotliHTMLBr])),
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},
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// Test 22 - not allowed to get pre-brotli encoded file.
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{
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url: "https://foo/sub/brotli.html",
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acceptEncoding: "nicebrew", // contains "br" substring but not "br"
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expectedStatus: http.StatusOK,
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expectedBodyContent: testFiles[webrootSubBrotliHTML],
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expectedEtag: `"2n9cd"`,
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expectedVary: "",
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expectedEncoding: "",
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expectedContentLength: strconv.Itoa(len(testFiles[webrootSubBrotliHTML])),
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},
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// Test 23 - treat existing file as a directory.
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{
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url: "https://foo/file1.html/other",
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expectedStatus: http.StatusNotFound,
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},
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// Test 24 - access folder with index file without trailing slash, with stripped path
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{
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url: "https://foo/bar/dirwithindex",
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stripPathPrefix: "/bar/",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/bar/dirwithindex/",
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expectedBodyContent: movedPermanently,
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},
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// Test 25 - access folder with index file without trailing slash, with stripped path and query params
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{
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url: "https://foo/bar/dirwithindex?param1=val",
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stripPathPrefix: "/bar/",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/bar/dirwithindex/?param1=val",
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expectedBodyContent: movedPermanently,
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},
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// Test 26 - site defined with path ("bar"), which has that prefix stripped
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{
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url: "https://foo/bar/file1.html/",
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stripPathPrefix: "/bar/",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/bar/file1.html",
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expectedBodyContent: movedPermanently,
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},
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{
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// Test 27 - Check etag
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url: "https://foo/notindex.html",
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expectedStatus: http.StatusOK,
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expectedBodyContent: testFiles[webrootNotIndexHTML],
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expectedEtag: `"2n9cm"`,
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expectedContentLength: strconv.Itoa(len(testFiles[webrootNotIndexHTML])),
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},
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{
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// Test 28 - Prevent path-based open redirects (directory)
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url: "https://foo//example.com%2f..",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/example.com/../",
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expectedBodyContent: movedPermanently,
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},
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{
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// Test 29 - Prevent path-based open redirects (file)
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url: "https://foo//example.com%2f../dirwithindex/index.html",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/example.com/../dirwithindex/",
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expectedBodyContent: movedPermanently,
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},
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{
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// Test 29 - Prevent path-based open redirects (extra leading slashes)
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url: "https://foo///example.com%2f..",
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expectedStatus: http.StatusMovedPermanently,
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expectedLocation: "https://foo/example.com/../",
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expectedBodyContent: movedPermanently,
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},
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}
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for i, test := range tests {
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// set up response writer and request
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responseRecorder := httptest.NewRecorder()
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request, err := http.NewRequest("GET", test.url, nil)
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if err != nil {
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t.Errorf("Test %d: Error making request: %v", i, err)
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continue
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}
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// set the original URL and path prefix on the context
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ctx := context.WithValue(request.Context(), caddy.CtxKey("original_url"), *request.URL)
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request = request.WithContext(ctx)
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ctx = context.WithValue(request.Context(), caddy.CtxKey("path_prefix"), test.stripPathPrefix)
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request = request.WithContext(ctx)
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request.Header.Add("Accept-Encoding", test.acceptEncoding)
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// simulate cases where a site is defined with a path prefix (e.g. "localhost/foo/")
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if test.stripPathPrefix != "" {
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request.URL.Path = strings.TrimPrefix(request.URL.Path, test.stripPathPrefix)
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}
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// perform the test
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status, err := fileserver.ServeHTTP(responseRecorder, request)
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etag := responseRecorder.Header().Get("Etag")
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body := responseRecorder.Body.String()
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vary := responseRecorder.Header().Get("Vary")
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encoding := responseRecorder.Header().Get("Content-Encoding")
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length := responseRecorder.Header().Get("Content-Length")
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// check if error matches expectations
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if err != nil {
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t.Errorf("Test %d: Serving file at %s failed. Error was: %v", i, test.url, err)
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}
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// check status code
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if test.expectedStatus != status {
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t.Errorf("Test %d: Expected status %d, found %d", i, test.expectedStatus, status)
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}
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// check etag
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if test.expectedEtag != etag {
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t.Errorf("Test %d: Expected Etag header %s, found %s", i, test.expectedEtag, etag)
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}
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// check vary
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if test.expectedVary != vary {
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t.Errorf("Test %d: Expected Vary header %s, found %s", i, test.expectedVary, vary)
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}
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// check content-encoding
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if test.expectedEncoding != encoding {
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t.Errorf("Test %d: Expected Content-Encoding header %s, found %s", i, test.expectedEncoding, encoding)
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}
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// check body content
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if !strings.Contains(body, test.expectedBodyContent) {
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t.Errorf("Test %d: Expected body to contain %q, found %q", i, test.expectedBodyContent, body)
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}
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// check Location header
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if test.expectedLocation != "" {
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l := responseRecorder.Header().Get("Location")
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if test.expectedLocation != l {
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t.Errorf("Test %d: Expected Location header %q, found %q", i, test.expectedLocation, l)
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}
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}
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// check content length
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if test.expectedContentLength != length {
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t.Errorf("Test %d: Expected Content-Length header %s, found %s", i, test.expectedContentLength, length)
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}
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}
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}
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// beforeServeHTTPTest creates a test directory with the structure, defined in the variable testFiles
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func beforeServeHTTPTest(t *testing.T) string {
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tmpdir, err := ioutil.TempDir("", testDirPrefix)
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if err != nil {
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t.Fatalf("failed to create test directory: %v", err)
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}
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fixedTime := time.Unix(123456, 0)
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for relFile, fileContent := range testFiles {
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absFile := filepath.Join(tmpdir, relFile)
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// make sure the parent directories exist
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parentDir := filepath.Dir(absFile)
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_, err = os.Stat(parentDir)
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if err != nil {
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os.MkdirAll(parentDir, os.ModePerm)
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}
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// now create the test files
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f, err := os.Create(absFile)
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if err != nil {
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t.Fatalf("Failed to create test file %s. Error was: %v", absFile, err)
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}
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// and fill them with content
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_, err = f.WriteString(fileContent)
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if err != nil {
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t.Fatalf("Failed to write to %s. Error was: %v", absFile, err)
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}
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f.Close()
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// and set the last modified time
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err = os.Chtimes(absFile, fixedTime, fixedTime)
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if err != nil {
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t.Fatalf("Failed to set file time to %s. Error was: %v", fixedTime, err)
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}
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}
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return tmpdir
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}
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// afterServeHTTPTest removes the test dir and all its content
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func afterServeHTTPTest(t *testing.T, webroot string) {
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if !strings.Contains(webroot, testDirPrefix) {
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t.Fatalf("Cannot clean up after test because webroot is: %s", webroot)
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}
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// cleans up everything under the test dir. No need to clean the individual files.
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err := os.RemoveAll(webroot)
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if err != nil {
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t.Fatalf("Failed to clean up test dir %s. Error was: %v", webroot, err)
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}
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}
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// failingFS implements the http.FileSystem interface. The Open method always returns the error, assigned to err
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type failingFS struct {
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err error // the error to return when Open is called
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fileImpl http.File // inject the file implementation
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}
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// Open returns the assigned failingFile and error
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func (f failingFS) Open(path string) (http.File, error) {
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return f.fileImpl, f.err
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}
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// failingFile implements http.File but returns a predefined error on every Stat() method call.
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type failingFile struct {
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http.File
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err error
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}
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// Stat returns nil FileInfo and the provided error on every call
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func (ff failingFile) Stat() (os.FileInfo, error) {
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return nil, ff.err
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}
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// Close is noop and returns no error
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func (ff failingFile) Close() error {
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return nil
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}
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// TestServeHTTPFailingFS tests error cases where the Open
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// function fails with various errors.
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func TestServeHTTPFailingFS(t *testing.T) {
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tests := []struct {
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fsErr error
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expectedStatus int
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expectedErr error
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expectedHeaders map[string]string
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}{
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{
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fsErr: os.ErrNotExist,
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expectedStatus: http.StatusNotFound,
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expectedErr: nil,
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},
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{
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fsErr: os.ErrPermission,
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expectedStatus: http.StatusForbidden,
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expectedErr: os.ErrPermission,
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},
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{
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fsErr: errCustom,
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expectedStatus: http.StatusServiceUnavailable,
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expectedErr: errCustom,
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expectedHeaders: map[string]string{"Retry-After": "5"},
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},
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}
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for i, test := range tests {
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// initialize a file server with the failing FileSystem
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fileserver := FileServer{Root: failingFS{err: test.fsErr}}
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// prepare the request and response
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request, err := http.NewRequest("GET", "https://foo/", nil)
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if err != nil {
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t.Fatalf("Failed to build request. Error was: %v", err)
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}
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responseRecorder := httptest.NewRecorder()
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status, actualErr := fileserver.ServeHTTP(responseRecorder, request)
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// check the status
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if status != test.expectedStatus {
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t.Errorf("Test %d: Expected status %d, found %d", i, test.expectedStatus, status)
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}
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// check the error
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if actualErr != test.expectedErr {
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t.Errorf("Test %d: Expected err %v, found %v", i, test.expectedErr, actualErr)
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}
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// check the headers - a special case for server under load
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if test.expectedHeaders != nil && len(test.expectedHeaders) > 0 {
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for expectedKey, expectedVal := range test.expectedHeaders {
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actualVal := responseRecorder.Header().Get(expectedKey)
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if expectedVal != actualVal {
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t.Errorf("Test %d: Expected header %s: %s, found %s", i, expectedKey, expectedVal, actualVal)
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}
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}
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}
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}
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}
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// TestServeHTTPFailingStat tests error cases where the initial Open function succeeds,
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// but the Stat method on the opened file fails.
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func TestServeHTTPFailingStat(t *testing.T) {
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tests := []struct {
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statErr error
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expectedStatus int
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expectedErr error
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}{
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{
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statErr: os.ErrNotExist,
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expectedStatus: http.StatusNotFound,
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expectedErr: nil,
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},
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{
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statErr: os.ErrPermission,
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expectedStatus: http.StatusForbidden,
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expectedErr: os.ErrPermission,
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},
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{
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statErr: errCustom,
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expectedStatus: http.StatusInternalServerError,
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expectedErr: errCustom,
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},
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}
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for i, test := range tests {
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// initialize a file server. The FileSystem will not fail, but calls to the Stat method of the returned File object will
|
|
fileserver := FileServer{Root: failingFS{err: nil, fileImpl: failingFile{err: test.statErr}}}
|
|
|
|
// prepare the request and response
|
|
request, err := http.NewRequest("GET", "https://foo/", nil)
|
|
if err != nil {
|
|
t.Fatalf("Failed to build request. Error was: %v", err)
|
|
}
|
|
responseRecorder := httptest.NewRecorder()
|
|
|
|
status, actualErr := fileserver.ServeHTTP(responseRecorder, request)
|
|
|
|
// check the status
|
|
if status != test.expectedStatus {
|
|
t.Errorf("Test %d: Expected status %d, found %d", i, test.expectedStatus, status)
|
|
}
|
|
|
|
// check the error
|
|
if actualErr != test.expectedErr {
|
|
t.Errorf("Test %d: Expected err %v, found %v", i, test.expectedErr, actualErr)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Paths for the fake site used temporarily during testing.
|
|
var (
|
|
webrootFile1HTML = filepath.Join(webrootName, "file1.html")
|
|
webrootNotIndexHTML = filepath.Join(webrootName, "notindex.html")
|
|
webrootDirFile2HTML = filepath.Join(webrootName, "dir", "file2.html")
|
|
webrootDirHiddenHTML = filepath.Join(webrootName, "dir", "hidden.html")
|
|
webrootDirwithindexIndexHTML = filepath.Join(webrootName, "dirwithindex", "index.html")
|
|
webrootSubGzippedHTML = filepath.Join(webrootName, "sub", "gzipped.html")
|
|
webrootSubGzippedHTMLGz = filepath.Join(webrootName, "sub", "gzipped.html.gz")
|
|
webrootSubGzippedHTMLBr = filepath.Join(webrootName, "sub", "gzipped.html.br")
|
|
webrootSubBrotliHTML = filepath.Join(webrootName, "sub", "brotli.html")
|
|
webrootSubBrotliHTMLGz = filepath.Join(webrootName, "sub", "brotli.html.gz")
|
|
webrootSubBrotliHTMLBr = filepath.Join(webrootName, "sub", "brotli.html.br")
|
|
webrootSubBarDirWithIndexIndexHTML = filepath.Join(webrootName, "bar", "dirwithindex", "index.html")
|
|
)
|
|
|
|
// testFiles is a map with relative paths to test files as keys and file content as values.
|
|
// The map represents the following structure:
|
|
// - $TEMP/caddy_testdir/
|
|
// '-- unreachable.html
|
|
// '-- webroot/
|
|
// '---- file1.html
|
|
// '---- dirwithindex/
|
|
// '------ index.html
|
|
// '---- dir/
|
|
// '------ file2.html
|
|
// '------ hidden.html
|
|
var testFiles = map[string]string{
|
|
"unreachable.html": "<h1>must not leak</h1>",
|
|
webrootFile1HTML: "<h1>file1.html</h1>",
|
|
webrootNotIndexHTML: "<h1>notindex.html</h1>",
|
|
webrootDirFile2HTML: "<h1>dir/file2.html</h1>",
|
|
webrootDirwithindexIndexHTML: "<h1>dirwithindex/index.html</h1>",
|
|
webrootDirHiddenHTML: "<h1>dir/hidden.html</h1>",
|
|
webrootSubGzippedHTML: "<h1>gzipped.html</h1>",
|
|
webrootSubGzippedHTMLGz: "1.gzipped.html.gz",
|
|
webrootSubGzippedHTMLBr: "2.gzipped.html.br",
|
|
webrootSubBrotliHTML: "3.brotli.html",
|
|
webrootSubBrotliHTMLGz: "4.brotli.html.gz",
|
|
webrootSubBrotliHTMLBr: "5.brotli.html.br",
|
|
webrootSubBarDirWithIndexIndexHTML: "<h1>bar/dirwithindex/index.html</h1>",
|
|
}
|
|
|
|
var errCustom = errors.New("custom error")
|
|
|
|
const (
|
|
testDirPrefix = "caddy_fileserver_test"
|
|
webrootName = "webroot" // name of the folder inside the tmp dir that has the site
|
|
)
|
|
|
|
//-------------------------------------------------------------------------------------------------
|
|
|
|
type fileInfo struct {
|
|
name string
|
|
size int64
|
|
mode os.FileMode
|
|
modTime time.Time
|
|
isDir bool
|
|
}
|
|
|
|
func (fi fileInfo) Name() string {
|
|
return fi.name
|
|
}
|
|
|
|
func (fi fileInfo) Size() int64 {
|
|
return fi.size
|
|
}
|
|
|
|
func (fi fileInfo) Mode() os.FileMode {
|
|
return fi.mode
|
|
}
|
|
|
|
func (fi fileInfo) ModTime() time.Time {
|
|
return fi.modTime
|
|
}
|
|
|
|
func (fi fileInfo) IsDir() bool {
|
|
return fi.isDir
|
|
}
|
|
|
|
func (fi fileInfo) Sys() interface{} {
|
|
return nil
|
|
}
|
|
|
|
var _ os.FileInfo = fileInfo{}
|
|
|
|
func BenchmarkEtag(b *testing.B) {
|
|
d := fileInfo{
|
|
size: 1234567890,
|
|
modTime: time.Now(),
|
|
}
|
|
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
calculateEtag(d)
|
|
}
|
|
}
|