Ajax
出自六年制學程
目錄
HTTP 中的 form-data Content-Type
常見的傳輸格式：
- Content-Type: application/json 代表請求內容是 JSON
- Content-Type: image/png 代表請求內容是圖片檔
- Content-Type: multipart/form-data 使用 (RFC7578) 規範，用一個請求傳送複數個資料格式，主要用於表單或實作檔案上傳
FormData 類別
資料後送
etable 舊版
檔案上傳
前台程式
<!DOCTYPE html>
<html>
<head>
<title> Ajax JavaScript File Upload Example </title>
</head>
<body>
<!-- HTML5 Input Form Elements -->
<input id="fileupload" type="file" name="formData" />
<button id="upload-button" onclick="uploadFile()"> Upload </button>
<!-- Ajax JavaScript File Upload Logic -->
<script>
async function uploadFile() {
let formData = new FormData();
formData.append("file", fileupload.files[0]);
await fetch('./upload.php', {
method: "POST",
body: formData
});
alert('The file has been uploaded successfully.');
}
</script>
</body>
</html>
對應的後台程式 upload.php
<?php
/* Get the name of the uploaded file */
$filename = $_FILES['file']['name'];
/* Choose where to save the uploaded file */
$location = "./upload/".$filename;
/* Save the uploaded file to the local filesystem */
if ( move_uploaded_file($_FILES['file']['tmp_name'], $location) ) {
echo 'Success';
} else {
echo 'Failure';
}
?>
