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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| package handlers | ||
|
|
||
| import ( | ||
| "hash/fnv" | ||
| "log" | ||
| "net/http" | ||
| "strconv" | ||
| "strings" | ||
| "sync" | ||
|
|
||
| configuration "github.com/oktalz/present/config" | ||
| ) | ||
|
|
||
| func IFrame(config configuration.Config) http.Handler { //nolint:funlen | ||
| eTagFrame := "" | ||
| var mu sync.RWMutex | ||
| pageResult := page | ||
| aspectRatioChange := func() { | ||
| mu.Lock() | ||
| defer mu.Unlock() | ||
| pageResult = page | ||
| if config.AspectRatio.AspectRatio != "" { | ||
| aspectRatio := strings.Split(config.AspectRatio.AspectRatio, ":") | ||
| if len(aspectRatio) == 1 { | ||
| aspectRatio = strings.Split(config.AspectRatio.AspectRatio, "x") | ||
| } | ||
| if len(aspectRatio) == 2 { | ||
| width, _ := strconv.Atoi(aspectRatio[0]) | ||
| height, _ := strconv.Atoi(aspectRatio[1]) | ||
| pageResult = strings.Replace(pageResult, "widthRatio = 16", "widthRatio = "+strconv.Itoa(width), 1) | ||
| pageResult = strings.Replace(pageResult, "heightRatio = 9", "heightRatio = "+strconv.Itoa(height), 1) | ||
| } | ||
| } | ||
| hasher := fnv.New64a() | ||
| hasher.Write([]byte(pageResult)) | ||
| eTagFrame = strconv.FormatUint(hasher.Sum64(), 16) | ||
| } | ||
|
|
||
| aspectRatioChange() | ||
| go func() { | ||
| for { | ||
| aspectRatio := <-config.AspectRatio.ValueChanged | ||
| config.AspectRatio.AspectRatio = aspectRatio | ||
| aspectRatioChange() | ||
| } | ||
| }() | ||
|
|
||
| return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| _ = cookieIDValue(w, r) | ||
| userOK, adminPrivileges := cookieAuth(config.Security.UserPwd, config.Security.AdminPwd, r) | ||
| if config.Security.AdminPwdDisable && !adminPrivileges { | ||
| adminPrivileges = true | ||
| } | ||
| if config.Security.UserPwd != "" && !adminPrivileges { | ||
| if !(userOK) { | ||
| http.Redirect(w, r, "/login", http.StatusFound) | ||
| return | ||
| } | ||
| } | ||
|
|
||
| origin := r.Header.Get("Origin") | ||
| if origin != "" { | ||
| w.Header().Set("Access-Control-Allow-Origin", origin) | ||
| } | ||
| w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS") | ||
| if r.Method == http.MethodOptions { | ||
| return | ||
| } | ||
|
|
||
| var response []byte | ||
| _ = response | ||
| eTag := r.Header.Get("If-None-Match") | ||
| mu.RLock() | ||
| defer mu.RUnlock() | ||
| if eTagFrame == eTag { | ||
| w.WriteHeader(http.StatusNotModified) | ||
| return | ||
| } | ||
|
|
||
| w.Header().Set("Content-Type", "text/html") | ||
| w.Header().Set("ETag", eTagFrame) | ||
| w.WriteHeader(http.StatusOK) | ||
|
|
||
| _, err := w.Write([]byte(pageResult)) | ||
| if err != nil { | ||
| log.Println(err) | ||
| return | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| var page = ` | ||
| <!DOCTYPE html> | ||
| <html lang="en"> | ||
| <head> | ||
| <meta charset="UTF-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | ||
| <style> | ||
| .iframe-container { | ||
| max-height: 100vh; | ||
| max-width: 100vw; | ||
| position: relative; | ||
| margin: auto; | ||
| } | ||
| .iframe-container iframe { | ||
| position: absolute; | ||
| top: 0; | ||
| left: 0; | ||
| width: 100%; | ||
| height: 100%; | ||
| border: none; | ||
| } | ||
| body { | ||
| margin: 0; | ||
| padding: 0; | ||
| width: 100vw; | ||
| height: 100vh; | ||
| overflow: hidden; | ||
| } | ||
| </style> | ||
| </head> | ||
| <body> | ||
| <div class="iframe-container"> | ||
| <iframe src="/print" id="present-iframe" name="present-iframe" sandbox="allow-scripts allow-same-origin allow-storage-access-by-user-activation"></iframe> | ||
| </div> | ||
| <script> | ||
| widthRatio = 16 | ||
| heightRatio = 9 | ||
| console.log(location.origin) | ||
| document.getElementById('present-iframe').src = location.origin+'/print'; | ||
| calcAspectRatioFit = function() { | ||
| expectedRatio = widthRatio / heightRatio | ||
| currentRatio = window.innerWidth / window.innerHeight | ||
| if (widthRatio >= heightRatio) { | ||
| if (currentRatio < expectedRatio) { | ||
| document.querySelector('.iframe-container').style.width = '100svw'; | ||
| document.querySelector('.iframe-container').style.height = (window.innerWidth * heightRatio / widthRatio) + 'px'; | ||
| } else { | ||
| document.querySelector('.iframe-container').style.width = (window.innerHeight * widthRatio / heightRatio) + 'px'; | ||
| document.querySelector('.iframe-container').style.height = '100svh'; | ||
| } | ||
| } else { | ||
| if (currentRatio < expectedRatio) { | ||
| document.querySelector('.iframe-container').style.width = '100svw'; | ||
| document.querySelector('.iframe-container').style.height = (window.innerWidth * heightRatio / widthRatio) + 'px'; | ||
| } else { | ||
| document.querySelector('.iframe-container').style.width = (window.innerHeight * widthRatio / heightRatio) + 'px'; | ||
| document.querySelector('.iframe-container').style.height = '100svh'; | ||
| } | ||
| } | ||
| } | ||
| calcAspectRatioFit() | ||
| window.addEventListener("resize", calcAspectRatioFit); | ||
| </script> | ||
| </body> | ||
| </html> | ||
| ` |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -74,7 +74,7 @@ onPageChange = function() { | |
| {{- end -}} | ||
| return; | ||
| }; | ||
| </script | ||
| </script> | ||
| </html> | ||
|
|
||
| {{ define "slide" }} | ||
|
|
||