Kadai3-2: lfcd85 - #33
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tenntenn
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Jun 21, 2019
| PHONY: fmt | ||
| fmt: | ||
| go fmt ./... | ||
| go vet ./... |
tenntenn
reviewed
Jun 21, 2019
| } | ||
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| // Execute do the split download. | ||
| func (d *Downloader) Execute() error { |
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せっかくなので引数にcontext.Contextとって、nilならBackgroundにしても良いかも。
tenntenn
reviewed
Jun 21, 2019
| ctx, cancel := context.WithCancel(bc) | ||
| defer cancel() | ||
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| req, err := http.NewRequest("GET", d.url.String(), nil) |
tenntenn
reviewed
Jun 21, 2019
| return err | ||
| } | ||
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| resp, err := http.DefaultClient.Do(req) |
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HTTPクライアントを変更できるようにしておくとよいかも。
最近はあんまり必要ないかもしれないけど、GAEだと特殊なHTTPクライアントを使う必要があったりするので。
tenntenn
reviewed
Jun 21, 2019
| return err | ||
| } | ||
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| err = d.combine(tempDir) |
tenntenn
reviewed
Jun 21, 2019
| if err != nil { | ||
| return err | ||
| } | ||
| fmt.Printf("Download completed! saved at: %v\n", d.outputPath) |
tenntenn
reviewed
Jun 21, 2019
| } | ||
| fmt.Printf("Download completed! saved at: %v\n", d.outputPath) | ||
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| return err |
tenntenn
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Jun 21, 2019
| } | ||
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| func (d *Downloader) downloadByRanges(ctx context.Context, tempDir string) error { | ||
| var eg errgroup.Group |
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errgourp.WithContextを呼ばないとキャンセルされない
tenntenn
reviewed
Jun 21, 2019
| return err | ||
| } | ||
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| partialPath := generatePartialPath(tempDir, i) |
tenntenn
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Jun 21, 2019
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| for i, _ := range d.ranges { | ||
| partialPath := generatePartialPath(tempDir, i) | ||
| partial, err := os.Open(partialPath) |
tenntenn
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Jun 21, 2019
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| w.Header().Set("Content-Length", strconv.Itoa(len(body))) | ||
| w.WriteHeader(http.StatusPartialContent) | ||
| w.Write(body) |
tenntenn
reviewed
Jun 21, 2019
| return ts, func() { ts.Close() } | ||
| } | ||
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| func (tsf *testServerFile) testServerHandler(t *testing.T, w http.ResponseWriter, r *http.Request) { |
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せっかくなんで大きなファイルもテストできるようにするとよいかも。
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課題3-2
分割ダウンローダを作ろうの実装です。Specs
TODO
testdataからテストできるようにしました: 0dd26ec(
hioki-daichiさんのこちらを参考にしました)