Initial commit

24 - HTTP Servers/httpserver/certificate.cer

@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

24 - HTTP Servers/httpserver/certificate.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

24 - HTTP Servers/httpserver/cookies.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+    "net/http"
+    "fmt"
+    "strconv"
+)
+
+func GetAndSetCookie(writer http.ResponseWriter, request *http.Request) {
+
+    counterVal := 1
+    counterCookie, err := request.Cookie("counter")
+    if (err == nil) {
+        counterVal, _ = strconv.Atoi(counterCookie.Value)
+        counterVal++
+    } 
+    http.SetCookie(writer, &http.Cookie{
+        Name: "counter", Value: strconv.Itoa(counterVal),
+    })
+
+    if (len(request.Cookies()) > 0) {
+        for _, c := range request.Cookies() {
+            fmt.Fprintf(writer, "Cookie Name: %v, Value: %v", c.Name, c.Value)
+        }
+    } else {
+        fmt.Fprintln(writer, "Request contains no cookies")
+    }
+}
+
+func init() {
+    http.HandleFunc("/cookies", GetAndSetCookie)
+}

24 - HTTP Servers/httpserver/dynamic.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+    "html/template"
+    "net/http"
+    "strconv"
+)
+
+type Context struct {
+    Request *http.Request
+    Data []Product
+}
+
+var htmlTemplates *template.Template
+
+func HandleTemplateRequest(writer http.ResponseWriter, request *http.Request) {
+    path := request.URL.Path
+    if (path == "") {
+        path = "products.html"
+    }
+    t := htmlTemplates.Lookup(path)
+    if (t == nil) {
+        http.NotFound(writer, request)
+    } else {
+        err := t.Execute(writer, Context{  request, Products})
+        if (err != nil) {
+            http.Error(writer, err.Error(), http.StatusInternalServerError)
+        }
+    }
+}
+
+func init() {
+    var err error
+    htmlTemplates = template.New("all")
+    htmlTemplates.Funcs(map[string]interface{} {
+        "intVal": strconv.Atoi,
+    })    
+    htmlTemplates, err = htmlTemplates.ParseGlob("templates/*.html")
+    if (err == nil) {
+        http.Handle("/templates/", http.StripPrefix("/templates/", 
+            http.HandlerFunc(HandleTemplateRequest)))        
+    } else {
+        panic(err)
+    }
+}

24 - HTTP Servers/httpserver/forms.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"net/http"
+	"strconv"
+)
+
+func ProcessFormData(writer http.ResponseWriter, request *http.Request) {
+    if (request.Method == http.MethodPost) {
+        index, _ := strconv.Atoi(request.PostFormValue("index"))                
+        p := Product {}
+        p.Name = request.PostFormValue("name")
+        p.Category = request.PostFormValue("category")
+        p.Price, _ = strconv.ParseFloat(request.PostFormValue("price"), 64)
+        Products[index] = p
+    } 
+    http.Redirect(writer, request, "/templates", http.StatusTemporaryRedirect)
+}
+
+func init() {
+    http.HandleFunc("/forms/edit", ProcessFormData)
+}

24 - HTTP Servers/httpserver/go.mod

@@ -0,0 +1,3 @@
+module httpserver
+
+go 1.17

24 - HTTP Servers/httpserver/json.go

@@ -0,0 +1,15 @@
+package main
+
+import (
+    "net/http"
+    "encoding/json"
+)
+
+func HandleJsonRequest(writer http.ResponseWriter, request *http.Request) {
+    writer.Header().Set("Content-Type", "application/json")
+    json.NewEncoder(writer).Encode(Products)
+}
+
+func init() {
+    http.HandleFunc("/json", HandleJsonRequest)
+}

24 - HTTP Servers/httpserver/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+    "net/http"
+    "io"
+    "strings"
+)
+
+type StringHandler struct {
+    message string
+}
+
+func (sh StringHandler) ServeHTTP(writer http.ResponseWriter, 
+        request *http.Request) {
+    Printfln("Request for %v", request.URL.Path)
+    io.WriteString(writer, sh.message)    
+}
+
+func HTTPSRedirect(writer http.ResponseWriter, 
+        request *http.Request) {
+    host := strings.Split(request.Host, ":")[0] 
+    target := "https://" + host + ":5500" + request.URL.Path 
+    if len(request.URL.RawQuery) > 0 {
+        target += "?" + request.URL.RawQuery
+    }
+    http.Redirect(writer, request, target, http.StatusTemporaryRedirect)
+}
+
+func main() {
+    http.Handle("/message", StringHandler{ "Hello, World"})
+    http.Handle("/favicon.ico", http.NotFoundHandler())
+    http.Handle("/", http.RedirectHandler("/message", http.StatusTemporaryRedirect))
+
+    fsHandler := http.FileServer(http.Dir("./static"))
+    http.Handle("/files/", http.StripPrefix("/files", fsHandler))
+
+    go func () {
+        err := http.ListenAndServeTLS(":5500", "certificate.cer", 
+            "certificate.key", nil)
+        if (err != nil) {
+            Printfln("HTTPS Error: %v", err.Error())
+        }
+    }()
+
+    err := http.ListenAndServe(":5000", http.HandlerFunc(HTTPSRedirect))
+    if (err != nil) {
+        Printfln("Error: %v", err.Error())
+    }
+}

24 - HTTP Servers/httpserver/printer.go

@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func Printfln(template string, values ...interface{}) {
+    fmt.Printf(template + "\n", values...)
+}

24 - HTTP Servers/httpserver/product.go

@@ -0,0 +1,17 @@
+package main
+
+type Product struct {
+    Name, Category string
+    Price float64
+}
+
+var Products = []Product {
+    { "Kayak", "Watersports", 279 },
+    { "Lifejacket", "Watersports", 49.95 },
+    { "Soccer Ball", "Soccer", 19.50 },
+    { "Corner Flags", "Soccer", 34.95 },
+    { "Stadium", "Soccer", 79500 },        
+    { "Thinking Cap", "Chess", 16 },
+    { "Unsteady Chair", "Chess", 75 },
+    { "Bling-Bling King", "Chess", 1200 },        
+}

24 - HTTP Servers/httpserver/static/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Pro Go</title>
+    <meta name="viewport" content="width=device-width" />
+    <link href="bootstrap.min.css" rel="stylesheet" />
+</head>
+<body>
+    <div class="m-1 p-2 bg-primary text-white h2">
+        Hello, World
+    </div>
+</body>
+</html>

24 - HTTP Servers/httpserver/static/store.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Pro Go</title>
+    <meta name="viewport" content="width=device-width" />
+    <link href="bootstrap.min.css" rel="stylesheet" />
+</head>
+<body>
+    <div class="m-1 p-2 bg-primary text-white h2 text-center">
+        Products
+    </div>
+    <table class="table table-sm table-bordered table-striped">
+        <thead>
+            <tr><th>Name</th><th>Category</th><th>Price</th></tr>
+        </thead>
+        <tbody>
+            <tr><td>Kayak</td><td>Watersports</td><td>$279.00</td></tr>
+            <tr><td>Lifejacket</td><td>Watersports</td><td>$49.95</td></tr>
+        </tbody>
+    </table>
+</body>
+</html>

24 - HTTP Servers/httpserver/static/upload.html

@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Pro Go</title>
+    <meta name="viewport" content="width=device-width" />
+    <link href="bootstrap.min.css" rel="stylesheet" />
+</head>
+<body>
+    <div class="m-1 p-2 bg-primary text-white h2 text-center">
+        Upload File
+    </div>
+    <form method="POST" action="/forms/upload" class="p-2" 
+            enctype="multipart/form-data">
+        <div class="form-group">
+            <label class="form-label">Name</label>
+            <input class="form-control" type="text" name="name">
+        </div>
+        <div class="form-group">
+            <label class="form-label">City</label>
+            <input class="form-control" type="text" name="city">
+        </div>
+        <div class="form-group">
+            <label class="form-label">Choose Files</label>
+            <input class="form-control" type="file" name="files" multiple>
+        </div>
+        <button type="submit" class="btn btn-primary mt-2">Upload</button>
+    </form>
+</body>
+</html>

24 - HTTP Servers/httpserver/templates/edit.html

@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta name="viewport" content="width=device-width" />
+    <title>Pro Go</title>
+    <link rel="stylesheet" href="/files/bootstrap.min.css" >
+</head>
+<body>
+    {{ $index := intVal (index (index .Request.URL.Query "index") 0) }}    
+    {{ if lt $index (len .Data)}}
+        {{ with index .Data $index}}    
+            <h3 class="bg-primary text-white text-center p-2 m-2">Product</h3>
+            <form method="POST" action="/forms/edit" class="m-2">
+                <div class="form-group">
+                    <label>Index</label>
+                    <input name="index" value="{{$index}}" 
+                        class="form-control" disabled />
+                    <input name="index" value="{{$index}}" type="hidden" />
+                </div>
+                <div class="form-group">
+                    <label>Name</label>
+                    <input name="name" value="{{.Name}}" class="form-control"/>
+                </div>        
+                <div class="form-group">
+                    <label>Category</label>
+                    <input name="category" value="{{.Category}}" 
+                        class="form-control"/>
+                </div>                
+                <div class="form-group">
+                    <label>Price</label>
+                    <input name="price" value="{{.Price}}" class="form-control"/>
+                </div>                        
+                <div class="mt-2">
+                    <button type="submit" class="btn btn-primary">Save</button>
+                    <a href="/templates/" class="btn btn-secondary">Cancel</a>        
+                </div>
+            </form>
+        {{ end }}
+    {{ else }}
+        <h3 class="bg-danger text-white text-center p-2">
+            No Product At Specified Index
+        </h3>
+    {{end }}
+</body>
+</html>

24 - HTTP Servers/httpserver/templates/products.html

@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta name="viewport" content="width=device-width" />
+    <title>Pro Go</title>
+    <link rel="stylesheet" href="/files/bootstrap.min.css" >
+</head>
+<body>
+    <h3 class="bg-primary text-white text-center p-2 m-2">Products</h3>
+    <div class="p-2">
+        <table class="table table-sm table-striped table-bordered">
+            <thead>
+                <tr>
+                    <th>Index</th><th>Name</th><th>Category</th>
+                    <th class="text-end">Price</th>
+                </tr>
+            </thead>
+            <tbody>
+                {{ range $index, $product := .Data }}
+                    <tr>
+                        <td>{{ $index }}</td>
+                        <td>{{ $product.Name }}</td>
+                        <td>{{ $product.Category }}</td>
+                        <td class="text-end">
+                            {{ printf "$%.2f" $product.Price }}
+                        </td>
+                    </tr>
+                {{ end }}
+            </tbody>
+        </table>
+    </div>
+</body>
+</html>

24 - HTTP Servers/httpserver/upload.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+    "net/http"
+    "io"
+    "fmt"
+)
+
+func HandleMultipartForm(writer http.ResponseWriter, request *http.Request) {
+    request.ParseMultipartForm(10000000)
+    fmt.Fprintf(writer, "Name: %v, City: %v\n",     
+        request.MultipartForm.Value["name"][0], 
+        request.MultipartForm.Value["city"][0])
+    fmt.Fprintln(writer, "------")
+
+    for _, header := range request.MultipartForm.File["files"] {
+        fmt.Fprintf(writer, "Name: %v, Size: %v\n", header.Filename, header.Size)
+        file, err := header.Open()
+        if (err == nil) {
+            defer file.Close()
+            fmt.Fprintln(writer, "------")
+            io.Copy(writer, file)
+        } else {
+            http.Error(writer, err.Error(), http.StatusInternalServerError)
+            return
+        }
+    }
+}
+
+func init() {
+    http.HandleFunc("/forms/upload", HandleMultipartForm)
+}