Ch1: pp65-66 adding HTTP response headers.

.idea/workspace.xml

@@ -1,10 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="0ddf907f-19c6-4800-b618-ea38c205c4ec" name="Default" comment="">
-      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/ch1/ex5/ex5_user_get.go" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
-    </list>
+    <list default="true" id="0ddf907f-19c6-4800-b618-ea38c205c4ec" name="Default" comment="" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="TRACKING_ENABLED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
@@ -26,11 +23,11 @@
   <component name="ExecutionTargetManager" SELECTED_TARGET="default_target" />
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file leaf-file-name="ex5_user_get.go" pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/ch1/ex5/ex5_user_get.go">
+      <file leaf-file-name="ex6_headers.go" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/ch1/ex6/ex6_headers.go">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="251">
-              <caret line="54" column="26" lean-forward="true" selection-start-line="54" selection-start-column="26" selection-end-line="54" selection-end-column="26" />
+            <state relative-caret-position="504">
+              <caret line="76" column="0" lean-forward="false" selection-start-line="76" selection-start-column="0" selection-end-line="76" selection-end-column="0" />
               <folding />
             </state>
           </provider>
@@ -58,6 +55,7 @@
         <option value="$PROJECT_DIR$/ch1/db.sql" />
         <option value="$PROJECT_DIR$/ch1/ex4/ex4_user_create.go" />
         <option value="$PROJECT_DIR$/ch1/ex5/ex5_user_get.go" />
+        <option value="$PROJECT_DIR$/ch1/ex6/ex6_headers.go" />
       </list>
     </option>
   </component>
@@ -92,178 +90,6 @@
       <pane id="Scratches" />
       <pane id="ProjectPane">
         <subPane>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="GOPATH &lt;socialize&gt;" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="GOPATH &lt;socialize&gt;" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="github.com" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="GOPATH &lt;socialize&gt;" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="github.com" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="gogits" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="gogs" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="GOPATH &lt;socialize&gt;" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="github.com" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="gogits" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="gogs" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="modules" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="GOPATH &lt;socialize&gt;" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="github.com" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="gogits" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="gogs" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="modules" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="log" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="GOPATH &lt;socialize&gt;" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="github.com" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="go-xweb" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="log" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.jetbrains.php.config.library.PhpExternalLibrariesNodePatcher$PatchedExternalLibrariesNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Go SDK" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.NamedLibraryElementNode" />
-            </PATH_ELEMENT>
-          </PATH>
           <PATH>
             <PATH_ELEMENT>
               <option name="myItemId" value="socialize" />
@@ -302,25 +128,7 @@
               <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
             </PATH_ELEMENT>
             <PATH_ELEMENT>
-              <option name="myItemId" value="ex5" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="socialize" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="ch1" />
-              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="ex4" />
+              <option name="myItemId" value="ex6" />
               <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
             </PATH_ELEMENT>
           </PATH>
@@ -467,12 +275,12 @@
       <updated>1483445907825</updated>
       <workItem from="1483445909025" duration="655000" />
       <workItem from="1483473742718" duration="1801000" />
-      <workItem from="1483554707899" duration="3605000" />
+      <workItem from="1483554707899" duration="4145000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="6061000" />
+    <option name="totallyTimeSpent" value="6601000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="0" y="23" width="1436" height="877" extended-state="6" />
@@ -645,8 +453,16 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/ch1/ex5/ex5_user_get.go">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="251">
-          <caret line="54" column="26" lean-forward="true" selection-start-line="54" selection-start-column="26" selection-end-line="54" selection-end-column="26" />
+        <state relative-caret-position="209">
+          <caret line="51" column="54" lean-forward="true" selection-start-line="51" selection-start-column="54" selection-end-line="51" selection-end-column="54" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/ch1/ex6/ex6_headers.go">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="504">
+          <caret line="76" column="0" lean-forward="false" selection-start-line="76" selection-start-column="0" selection-end-line="76" selection-end-column="0" />
           <folding />
         </state>
       </provider>

ch1/ex6/ex6_headers.go

@@ -0,0 +1,94 @@
+package main
+
+import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	_ "github.com/go-sql-driver/mysql"
+	"github.com/gorilla/mux"
+	"log"
+	"net/http"
+)
+
+type API struct {
+	Message string "json:message"
+}
+
+type User struct {
+	ID    int    "json:id"
+	Name  string "json:username"
+	Email string "json:email"
+	First string "json:first"
+	Last  string "json:last"
+}
+
+var database *sql.DB
+
+func CreateUser(w http.ResponseWriter, r *http.Request) {
+	NewUser := User{}
+	NewUser.Name = r.FormValue("user")
+	NewUser.Email = r.FormValue("email")
+	NewUser.First = r.FormValue("first")
+	NewUser.Last = r.FormValue("last")
+	output, err := json.Marshal(NewUser)
+	if err != nil {
+		fmt.Println("Something went wrong with Marshal", err)
+	}
+	fmt.Println(string(output))
+
+	sql := "INSERT INTO users SET user_nickname='" + NewUser.Name + "'" +
+		", user_first = '" + NewUser.First + "'" +
+		", user_last = '" + NewUser.Last + "'" +
+		", user_email = '" + NewUser.Email + "';"
+	q, err := database.Exec(sql)
+	if err != nil {
+		fmt.Println("Something went wrong with INSERT", err)
+	}
+	last, err := q.LastInsertId()
+	affected, err := q.RowsAffected()
+	fmt.Printf("Last Id: %d, Affected rows: %d\n", last, affected)
+}
+
+func GetUser(w http.ResponseWriter, r *http.Request) {
+	header := w.Header()
+	header.Set("Pragma", "no-cache")
+	urlParams := mux.Vars(r)
+	id := urlParams["id"]
+	ReadUser := User{}
+	err := database.QueryRow("SELECT * FROM users WHERE user_id=?", id).Scan(
+		&ReadUser.ID,
+		&ReadUser.Name,
+		&ReadUser.First,
+		&ReadUser.Last,
+		&ReadUser.Email,
+	)
+	if err != nil {
+		fmt.Println("Something went wrong with QueryRow", err)
+	}
+	switch {
+	case err == sql.ErrNoRows:
+		fmt.Fprintf(w, "No such user")
+	case err != nil:
+		log.Fatal(err)
+		fmt.Fprint(w, "Error")
+	default:
+		output, _ := json.Marshal(ReadUser)
+		header.Set("Content-type", "application/json")
+		fmt.Fprint(w, string(output))
+	}
+}
+
+func main() {
+	db, err := sql.Open("mysql", "goroot:gopass@/go_sn")
+	if err != nil {
+		fmt.Println("Something went wrong with sql.Open", err)
+		return
+	}
+	database = db
+
+	routes := mux.NewRouter()
+	routes.HandleFunc("/api/{id:[\\d]+}", GetUser).Methods("GET")
+	routes.HandleFunc("/api/user/create", CreateUser).Methods("GET")
+	http.Handle("/", routes)
+	http.ListenAndServe(":8080", nil)
+}