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feat:调整上传逻辑

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伍兴隆
2025-11-14 13:43:24 +08:00
parent f0f8d9ef69
commit 13d5a31197
1 changed files with 66 additions and 63 deletions
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129
lib/upload_image/look_images_widget.dart
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@@ -129,6 +129,71 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
return null;
}
/// 可选：根据字节头自动识别文件后缀（如图片、视频）
String getExtension(Uint8List uint8List) {
if (uint8List.length < 4) return "bin"; // 无法识别时返回二进制后缀
// PNG 头：89 50 4E 47
if (uint8List[0] == 0x89 &&
uint8List[1] == 0x50 &&
uint8List[2] == 0x4E &&
uint8List[3] == 0x47) {
return "png";
}
// JPG 头：FF D8 FF
else if (uint8List[0] == 0xFF && uint8List[1] == 0xD8 && uint8List[2] == 0xFF) {
return "jpg";
}
// MP4 头：00 00 00 18 66 74 79 70
else if (uint8List.length >= 8 &&
uint8List[0] == 0x00 &&
uint8List[1] == 0x00 &&
uint8List[2] == 0x00 &&
uint8List[3] == 0x18 &&
uint8List[4] == 0x66 &&
uint8List[5] == 0x74 &&
uint8List[6] == 0x79 &&
uint8List[7] == 0x70) {
return "mp4";
}
// 其他格式可自行扩展（如 GIF、PDF 等）
else {
return "bin";
}
}
/// Uint8List 转临时 File
Future<File?> uint8ListToTempFile(Uint8List uint8List, {String fileName = "temp_file"}) async {
try {
// 1. 获取临时存储目录（跨平台兼容）
Directory tempDir = await getTemporaryDirectory();
String tempPath = tempDir.path;
// 2. 拼接文件路径（可自定义后缀，如 .png、.mp4 等）
File tempFile = File("$tempPath/$fileName.${getExtension(uint8List)}"); // 自动识别后缀（可选）
// 3. 将 Uint8List 写入文件
await tempFile.writeAsBytes(uint8List);
print("临时文件路径：${tempFile.path}");
String imageUrl = await UploadOss.upload(
tempFile.path,
fileType: getExtension(uint8List),
oSSAccessKeyId: widget.oSSAccessKeyId ?? '',
ossHost: widget.ossHost ?? '',
ossDirectory: widget.ossDirectory ?? '',
policy: widget.policy ?? '',
callback: widget.callback ?? '',
signature: widget.signature ?? '',
);
print("上传后的路径：$imageUrl");
return tempFile;
} catch (e) {
print("转换临时文件失败：$e");
return null;
}
}
@override
void initState() {
listData = widget.listData;
@@ -173,69 +238,7 @@ class _LookImagesWidgetState extends State<LookImagesWidget> {
child: GestureDetector(
onTap: () async {
Uint8List? imageFile = await editImage(url: listData[currentPage]);
/// 可选：根据字节头自动识别文件后缀（如图片、视频）
String getExtension(Uint8List uint8List) {
if (uint8List.length < 4) return "bin"; // 无法识别时返回二进制后缀
// PNG 头：89 50 4E 47
if (uint8List[0] == 0x89 &&
uint8List[1] == 0x50 &&
uint8List[2] == 0x4E &&
uint8List[3] == 0x47) {
return "png";
}
// JPG 头：FF D8 FF
else if (uint8List[0] == 0xFF && uint8List[1] == 0xD8 && uint8List[2] == 0xFF) {
return "jpg";
}
// MP4 头：00 00 00 18 66 74 79 70
else if (uint8List.length >= 8 &&
uint8List[0] == 0x00 &&
uint8List[1] == 0x00 &&
uint8List[2] == 0x00 &&
uint8List[3] == 0x18 &&
uint8List[4] == 0x66 &&
uint8List[5] == 0x74 &&
uint8List[6] == 0x79 &&
uint8List[7] == 0x70) {
return "mp4";
}
// 其他格式可自行扩展（如 GIF、PDF 等）
else {
return "bin";
}
}
/// Uint8List 转临时 File
Future<File?> uint8ListToTempFile(Uint8List uint8List, {String fileName = "temp_file"}) async {
try {
// 1. 获取临时存储目录（跨平台兼容）
Directory tempDir = await getTemporaryDirectory();
String tempPath = tempDir.path;
// 2. 拼接文件路径（可自定义后缀，如 .png、.mp4 等）
File tempFile = File("$tempPath/$fileName.${getExtension(uint8List)}"); // 自动识别后缀（可选）
// 3. 将 Uint8List 写入文件
await tempFile.writeAsBytes(uint8List);
print("临时文件路径：${tempFile.path}");
String string = await UploadOss.upload(
tempFile.path,
fileType: getExtension(uint8List),
oSSAccessKeyId: widget.oSSAccessKeyId ?? '',
ossHost: widget.ossHost ?? '',
ossDirectory: widget.ossDirectory ?? '',
policy: widget.policy ?? '',
callback: widget.callback ?? '',
signature: widget.signature ?? '',
);
return tempFile;
} catch (e) {
print("转换临时文件失败：$e");
return null;
}
}
uint8ListToTempFile(imageFile??Uint8List(0));
},
child: Icon(Icons.edit, color: Colors.white))),
//图片张数指示器