| 1 | package main |
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| 2 | |
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| 3 | import ( |
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| 4 | "fmt" |
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| 5 | "log" |
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| 6 | "net/http" |
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| 7 | "strings" |
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| 8 | ) |
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| 9 | |
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| 10 | func handler(w http.ResponseWriter, r *http.Request) { |
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| 11 | if r.URL.Path != "/" && !strings.HasSuffix(r.URL.Path, ".svg") { |
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| 12 | http.NotFound(w, r) |
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| 13 | return |
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| 14 | } |
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| 15 | |
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| 16 | logf("----------------------") |
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| 17 | logf(" => handling request: %v", r.URL) |
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| 18 | logf("----------------------") |
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| 19 | |
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| 20 | |
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| 21 | Analysis.OptsSetup() |
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| 22 | |
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| 23 | |
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| 24 | Analysis.OverrideByHTTP(r) |
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| 25 | |
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| 26 | var img string |
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| 27 | if img = Analysis.FindCachedImg(); img != "" { |
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| 28 | log.Println("serving file:", img) |
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| 29 | http.ServeFile(w, r, img) |
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| 30 | return |
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| 31 | } |
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| 32 | |
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| 33 | |
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| 34 | if e := Analysis.ProcessListArgs(); e != nil { |
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| 35 | http.Error(w, "invalid parameters", http.StatusBadRequest) |
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| 36 | return |
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| 37 | } |
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| 38 | |
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| 39 | output, err := Analysis.Render() |
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| 40 | if err != nil { |
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| 41 | http.Error(w, err.Error(), http.StatusInternalServerError) |
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| 42 | return |
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| 43 | } |
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| 44 | |
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| 45 | if r.Form.Get("format") == "dot" { |
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| 46 | log.Println("writing dot output..") |
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| 47 | fmt.Fprint(w, string(output)) |
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| 48 | return |
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| 49 | } |
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| 50 | |
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| 51 | log.Printf("converting dot to %s..\n", *outputFormat) |
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| 52 | |
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| 53 | img, err = dotToImage("", *outputFormat, output) |
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| 54 | if err != nil { |
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| 55 | http.Error(w, err.Error(), http.StatusInternalServerError) |
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| 56 | return |
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| 57 | } |
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| 58 | |
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| 59 | err = Analysis.CacheImg(img) |
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| 60 | if err != nil { |
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| 61 | http.Error(w, "cache img error: "+err.Error(), http.StatusBadRequest) |
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| 62 | return |
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| 63 | } |
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| 64 | |
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| 65 | log.Println("serving file:", img) |
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| 66 | http.ServeFile(w, r, img) |
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| 67 | } |
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| 68 | |
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| 69 | |
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