nlepage · xiaobai-world · Aug 6, 2021 · Aug 11, 2021
@@ -18,6 +18,7 @@
  - [Hello example](https://nlepage.github.io/go-wasm-http-server/hello) ([sources](https://github.com/nlepage/go-wasm-http-server/tree/master/docs/hello))
  - [Hello example with state](https://nlepage.github.io/go-wasm-http-server/hello-state) ([sources](https://github.com/nlepage/go-wasm-http-server/tree/master/docs/hello-state))
  - [Hello example with state and keepalive](https://nlepage.github.io/go-wasm-http-server/hello-state-keepalive) ([sources](https://github.com/nlepage/go-wasm-http-server/tree/master/docs/hello-state-keepalive))
+ - [Simulate large file](https://nlepage.github.io/go-wasm-http-server/simulate-large-file) ([sources](https://github.com/nlepage/go-wasm-http-server/tree/master/docs/simulate-large-file))
  - [😺 Catption generator example](https://nlepage.github.io/catption/wasm) ([sources](https://github.com/nlepage/catption/tree/wasm))
  - [Random password generator web server](https://nlepage.github.io/random-password-please/) ([sources](https://github.com/nlepage/random-password-please) forked from [jbarham/random-password-please](https://github.com/jbarham/random-password-please))
 

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"net/http"
+	"strconv"
+
+	wasmhttp "github.com/nlepage/go-wasm-http-server"
+)
+
+func main() {
+
+	one_kb := ""
+	for i := 0; i < 1024; i++ {
+		one_kb += "0"
+	}
+
+	http.HandleFunc("/create-file-by-size", func(res http.ResponseWriter, req *http.Request) {
+		vars := req.URL.Query()
+		size, ok := vars["size"]
+		if !ok {
+			res.WriteHeader(http.StatusBadRequest)
+			res.Write([]byte("URL must have size parameter."))
+			return
+		}
+
+		targetSize, err := strconv.ParseInt(size[0], 0, 0)
+
+		if err != nil {
+			res.WriteHeader(http.StatusBadRequest)
+			res.Write([]byte("Size must be 0 or a positive integer."))
+			return
+		}
+
+		if targetSize < 0 || targetSize > 300 {
+			res.WriteHeader(http.StatusBadRequest)
+			res.Write([]byte("Size must be >= 0 and <= 300."))
+			return
+		}
+
+		res.Header().Set("Content-Type", "application/octet-stream")
+		res.Header().Set("Content-Disposition", "attachment;filename=size-file")
+		for i := int64(1); i <= 1024*targetSize; i++ {
+			res.Write([]byte(one_kb))
+		}
+	})
+
+	wasmhttp.Serve(nil)
+
+	select {}
+}
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <meta charset="utf-8">
+  <title>go-wasm-http-server: simulate large file</title>
+  <style>
+    form {
+      margin: 2em auto;
+      text-align: center;
+      line-height: 180%;
+    }
+
+
+    input[type="range"] {
+      width: 300px;
+    }
+  </style>
+</head>
+
+<body>
+  <form name="simulateFile" action="./api/create-file-by-size?size=0" method="get">
+    <div>
+      <input type="range" step="1" min="0" max="300" value="10" name="size">
+      <div id="sizeText"></div>
+    </div>
+    <div>
+      <input type="submit" value="download file" />
+    </div>
+  </form>
+  <script>
+    navigator.serviceWorker.register("sw.js");
+
+    const form = document.forms.simulateFile
+    const size = form.elements.size
+
+    function sizeHandler() {
+      form.action = `./api/create-file-by-size?size=${size.value}`
+      document.querySelector('#sizeText').innerText = `${size.value} Mb`
+    }
+    size.addEventListener('input', sizeHandler)
+    sizeHandler()
+  </script>
+</body>
+
+
+
+</html>
@@ -0,0 +1,11 @@
+importScripts('https://cdn.jsdelivr.net/gh/nlepage/go-wasm-http-server@v1.0.0/sw.js')
+
+addEventListener('install', (event) => {
+  event.waitUntil(skipWaiting())
+})
+
+addEventListener('activate', event => {
+  event.waitUntil(clients.claim())
+})
+
+registerWasmHTTPListener('api.wasm', { base: 'api' })