|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "fmt" |
| 6 | + "net/http" |
| 7 | + "net/http/httptest" |
| 8 | + "os" |
| 9 | + "os/user" |
| 10 | + "path/filepath" |
| 11 | + "strconv" |
| 12 | + "strings" |
| 13 | + "sync/atomic" |
| 14 | + "testing" |
| 15 | + "time" |
| 16 | +) |
| 17 | + |
| 18 | +// helper to create deterministic content |
| 19 | +func makeContent(size int) []byte { |
| 20 | + data := make([]byte, size) |
| 21 | + for i := 0; i < size; i++ { |
| 22 | + data[i] = byte('A' + (i % 23)) |
| 23 | + } |
| 24 | + return data |
| 25 | +} |
| 26 | + |
| 27 | +// start a configurable HTTP server |
| 28 | +func startTestServer(t *testing.T, content []byte, supportRange bool, headShowsAcceptRanges bool, headHasContentLength bool, getHasContentLength bool, path string) (*httptest.Server, *int32) { |
| 29 | + var rangeRequests int32 |
| 30 | + |
| 31 | + h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
| 32 | + if r.URL.Path != path { |
| 33 | + w.WriteHeader(http.StatusNotFound) |
| 34 | + return |
| 35 | + } |
| 36 | + |
| 37 | + switch r.Method { |
| 38 | + case http.MethodHead: |
| 39 | + if headShowsAcceptRanges && supportRange { |
| 40 | + w.Header().Set("Accept-Ranges", "bytes") |
| 41 | + } |
| 42 | + if headHasContentLength { |
| 43 | + w.Header().Set("Content-Length", strconv.Itoa(len(content))) |
| 44 | + } |
| 45 | + w.WriteHeader(http.StatusOK) |
| 46 | + return |
| 47 | + case http.MethodGet: |
| 48 | + // Range probe |
| 49 | + rangeHeader := r.Header.Get("Range") |
| 50 | + if supportRange && rangeHeader != "" && strings.HasPrefix(rangeHeader, "bytes=") { |
| 51 | + atomic.AddInt32(&rangeRequests, 1) |
| 52 | + // parse bytes=start-end |
| 53 | + spec := strings.TrimPrefix(rangeHeader, "bytes=") |
| 54 | + parts := strings.SplitN(spec, "-", 2) |
| 55 | + start, _ := strconv.ParseInt(parts[0], 10, 64) |
| 56 | + var end int64 |
| 57 | + if parts[1] == "" { |
| 58 | + end = int64(len(content) - 1) |
| 59 | + } else { |
| 60 | + end, _ = strconv.ParseInt(parts[1], 10, 64) |
| 61 | + } |
| 62 | + if start < 0 { |
| 63 | + start = 0 |
| 64 | + } |
| 65 | + if end >= int64(len(content)) { |
| 66 | + end = int64(len(content) - 1) |
| 67 | + } |
| 68 | + if start > end { |
| 69 | + w.WriteHeader(http.StatusRequestedRangeNotSatisfiable) |
| 70 | + return |
| 71 | + } |
| 72 | + w.Header().Set("Content-Range", fmt.Sprintf("bytes %d-%d/%d", start, end, len(content))) |
| 73 | + if getHasContentLength { |
| 74 | + w.Header().Set("Content-Length", strconv.Itoa(int(end-start+1))) |
| 75 | + } |
| 76 | + w.WriteHeader(http.StatusPartialContent) |
| 77 | + _, _ = w.Write(content[start : end+1]) |
| 78 | + return |
| 79 | + } |
| 80 | + // regular GET |
| 81 | + if getHasContentLength { |
| 82 | + w.Header().Set("Content-Length", strconv.Itoa(len(content))) |
| 83 | + } |
| 84 | + w.WriteHeader(http.StatusOK) |
| 85 | + _, _ = w.Write(content) |
| 86 | + return |
| 87 | + default: |
| 88 | + w.WriteHeader(http.StatusMethodNotAllowed) |
| 89 | + } |
| 90 | + }) |
| 91 | + |
| 92 | + ts := httptest.NewServer(h) |
| 93 | + t.Cleanup(ts.Close) |
| 94 | + return ts, &rangeRequests |
| 95 | +} |
| 96 | + |
| 97 | +func withTempCwd(t *testing.T) func() { |
| 98 | + old, err := os.Getwd() |
| 99 | + if err != nil { |
| 100 | + t.Fatalf("Getwd failed: %v", err) |
| 101 | + } |
| 102 | + tdir := t.TempDir() |
| 103 | + if err := os.Chdir(tdir); err != nil { |
| 104 | + t.Fatalf("Chdir failed: %v", err) |
| 105 | + } |
| 106 | + return func() { _ = os.Chdir(old) } |
| 107 | +} |
| 108 | + |
| 109 | +func withTestDataFolder(t *testing.T) func() { |
| 110 | + original := dataFolder |
| 111 | + dataFolder = ".hget_e2e_test/" |
| 112 | + return func() { |
| 113 | + dataFolder = original |
| 114 | + usr, _ := user.Current() |
| 115 | + _ = os.RemoveAll(filepath.Join(usr.HomeDir, dataFolder)) |
| 116 | + } |
| 117 | +} |
| 118 | + |
| 119 | +func TestE2EParallelDownloadWithRange(t *testing.T) { |
| 120 | + displayProgress = false |
| 121 | + restoreCwd := withTempCwd(t) |
| 122 | + defer restoreCwd() |
| 123 | + restoreDF := withTestDataFolder(t) |
| 124 | + defer restoreDF() |
| 125 | + |
| 126 | + content := makeContent(256 * 1024) |
| 127 | + path := "/file.bin" |
| 128 | + ts, _ := startTestServer(t, content, true, true, true, true, path) |
| 129 | + |
| 130 | + url := ts.URL + path |
| 131 | + Execute(url, nil, 4, false, "", "") |
| 132 | + |
| 133 | + // Verify output file exists and content matches |
| 134 | + out := TaskFromURL(url) |
| 135 | + got, err := os.ReadFile(out) |
| 136 | + if err != nil { |
| 137 | + t.Fatalf("failed to read output: %v", err) |
| 138 | + } |
| 139 | + if !bytes.Equal(got, content) { |
| 140 | + t.Fatalf("downloaded content mismatch") |
| 141 | + } |
| 142 | + |
| 143 | + // Ensure data folder cleaned up |
| 144 | + usr, _ := user.Current() |
| 145 | + folder := filepath.Join(usr.HomeDir, dataFolder, TaskFromURL(url)) |
| 146 | + if _, err := os.Stat(folder); !os.IsNotExist(err) { |
| 147 | + t.Fatalf("expected data folder removed, got err=%v", err) |
| 148 | + } |
| 149 | +} |
| 150 | + |
| 151 | +func TestE2EResumeDownload(t *testing.T) { |
| 152 | + displayProgress = false |
| 153 | + restoreCwd := withTempCwd(t) |
| 154 | + defer restoreCwd() |
| 155 | + restoreDF := withTestDataFolder(t) |
| 156 | + defer restoreDF() |
| 157 | + |
| 158 | + content := makeContent(300 * 1024) |
| 159 | + path := "/resume.bin" |
| 160 | + ts, _ := startTestServer(t, content, true, true, true, true, path) |
| 161 | + url := ts.URL + path |
| 162 | + |
| 163 | + // Prepare partial state files inside the expected folder |
| 164 | + parts := partCalculate(4, int64(len(content)), url) |
| 165 | + folder := FolderOf(url) |
| 166 | + if err := MkdirIfNotExist(folder); err != nil { |
| 167 | + t.Fatalf("failed to create folder: %v", err) |
| 168 | + } |
| 169 | + for i := range parts { |
| 170 | + // write half of the part's size |
| 171 | + start := parts[i].RangeFrom |
| 172 | + end := parts[i].RangeTo |
| 173 | + if end == int64(len(content)) { // last part uses open end, approximate size |
| 174 | + end = int64(len(content) - 1) |
| 175 | + } |
| 176 | + partSize := end - start + 1 |
| 177 | + writeSize := partSize / 2 |
| 178 | + if writeSize <= 0 { |
| 179 | + writeSize = 1 |
| 180 | + } |
| 181 | + slice := content[start : start+writeSize] |
| 182 | + if err := os.WriteFile(parts[i].Path, slice, 0600); err != nil { |
| 183 | + t.Fatalf("failed to write partial part: %v", err) |
| 184 | + } |
| 185 | + } |
| 186 | + |
| 187 | + state := &State{URL: url, Parts: parts} |
| 188 | + if err := state.Save(); err != nil { |
| 189 | + t.Fatalf("failed to save state: %v", err) |
| 190 | + } |
| 191 | + |
| 192 | + // Resume will bump RangeFrom by the existing file sizes |
| 193 | + resumed, err := Resume(url) |
| 194 | + if err != nil { |
| 195 | + t.Fatalf("Resume failed: %v", err) |
| 196 | + } |
| 197 | + |
| 198 | + Execute(url, resumed, 4, false, "", "") |
| 199 | + |
| 200 | + out := TaskFromURL(url) |
| 201 | + got, err := os.ReadFile(out) |
| 202 | + if err != nil { |
| 203 | + t.Fatalf("failed to read output: %v", err) |
| 204 | + } |
| 205 | + if !bytes.Equal(got, content) { |
| 206 | + t.Fatalf("resumed content mismatch") |
| 207 | + } |
| 208 | +} |
| 209 | + |
| 210 | +func TestE2ERangeSupportedWithoutAcceptRanges(t *testing.T) { |
| 211 | + displayProgress = false |
| 212 | + restoreCwd := withTempCwd(t) |
| 213 | + defer restoreCwd() |
| 214 | + restoreDF := withTestDataFolder(t) |
| 215 | + defer restoreDF() |
| 216 | + |
| 217 | + content := makeContent(128 * 1024) |
| 218 | + path := "/noar.bin" |
| 219 | + ts, rangeCount := startTestServer(t, content, true, false, true, true, path) |
| 220 | + url := ts.URL + path |
| 221 | + |
| 222 | + Execute(url, nil, 3, false, "", "") |
| 223 | + |
| 224 | + // Confirm at least one ranged request happened |
| 225 | + if atomic.LoadInt32(rangeCount) == 0 { |
| 226 | + t.Fatalf("expected ranged requests when Accept-Ranges absent") |
| 227 | + } |
| 228 | + // Validate file |
| 229 | + out := TaskFromURL(url) |
| 230 | + got, err := os.ReadFile(out) |
| 231 | + if err != nil || !bytes.Equal(got, content) { |
| 232 | + t.Fatalf("download mismatch or error: %v", err) |
| 233 | + } |
| 234 | +} |
| 235 | + |
| 236 | +func TestE2EUnknownLengthSinglePart(t *testing.T) { |
| 237 | + displayProgress = false |
| 238 | + restoreCwd := withTempCwd(t) |
| 239 | + defer restoreCwd() |
| 240 | + restoreDF := withTestDataFolder(t) |
| 241 | + defer restoreDF() |
| 242 | + |
| 243 | + content := makeContent(64 * 1024) |
| 244 | + path := "/chunked.bin" |
| 245 | + // no Accept-Ranges, no Content-Length on HEAD or GET |
| 246 | + ts, _ := startTestServer(t, content, false, false, false, false, path) |
| 247 | + url := ts.URL + path |
| 248 | + |
| 249 | + Execute(url, nil, 4, false, "", "") |
| 250 | + |
| 251 | + out := TaskFromURL(url) |
| 252 | + got, err := os.ReadFile(out) |
| 253 | + if err != nil || !bytes.Equal(got, content) { |
| 254 | + t.Fatalf("download mismatch or error: %v", err) |
| 255 | + } |
| 256 | +} |
| 257 | + |
| 258 | +func TestE2EGlobalRateLimit(t *testing.T) { |
| 259 | + displayProgress = false |
| 260 | + restoreCwd := withTempCwd(t) |
| 261 | + defer restoreCwd() |
| 262 | + restoreDF := withTestDataFolder(t) |
| 263 | + defer restoreDF() |
| 264 | + |
| 265 | + content := makeContent(200 * 1024) // 200KB |
| 266 | + path := "/rate.bin" |
| 267 | + ts, _ := startTestServer(t, content, true, true, true, true, path) |
| 268 | + url := ts.URL + path |
| 269 | + |
| 270 | + start := time.Now() |
| 271 | + Execute(url, nil, 4, false, "", "100KB") |
| 272 | + dur := time.Since(start) |
| 273 | + |
| 274 | + // With global 100KB/s limit and a 100KB burst, 200KB typically completes ~1.0–1.1s. |
| 275 | + // Assert only that we are not effectively unthrottled (<0.9s would be suspicious on CI). |
| 276 | + if dur < 900*time.Millisecond { |
| 277 | + t.Fatalf("rate limiting too fast: %v", dur) |
| 278 | + } |
| 279 | + |
| 280 | + out := TaskFromURL(url) |
| 281 | + got, err := os.ReadFile(out) |
| 282 | + if err != nil || !bytes.Equal(got, content) { |
| 283 | + t.Fatalf("download mismatch or error: %v", err) |
| 284 | + } |
| 285 | +} |
0 commit comments