function resolveContent(fileService: IFileService, resource: URI, mime: string, callback: any): void {
	fileService.resolveContent(resource, { encoding: 'binary' }).then(contents => {
		callback({
			data: Buffer.from(contents.value, contents.encoding),
			mimeType: mime
		});
	}, (err) => {
		console.log(err);
		callback({ error: -2 /* FAILED: https://cs.chromium.org/chromium/src/net/base/net_error_list.h */ });
	});
}

function resolveContent(fileService: IFileService, resource: URI, mime: string, callback: BufferProtocolCallback): void {
	fileService.readFile(resource).then(contents => {
		callback({
			data: Buffer.from(contents.value.buffer),
			mimeType: mime
		});
	}, (err) => {
		console.log(err);
		callback({ error: -2 /* FAILED: https://cs.chromium.org/chromium/src/net/base/net_error_list.h */ });
	});
}

function save(resource: URI, isSaveAs: boolean, editorService: IWorkbenchEditorService, fileService: IFileService, untitledEditorService: IUntitledEditorService,
	textFileService: ITextFileService, editorGroupService: IEditorGroupService): TPromise<any> {

	if (resource && (fileService.canHandleResource(resource) || resource.scheme === Schemas.untitled)) {

		// Save As (or Save untitled with associated path)
		if (isSaveAs || resource.scheme === Schemas.untitled) {
			let encodingOfSource: string;
			if (resource.scheme === Schemas.untitled) {
				encodingOfSource = untitledEditorService.getEncoding(resource);
			} else if (fileService.canHandleResource(resource)) {
				const textModel = textFileService.models.get(resource);
				encodingOfSource = textModel && textModel.getEncoding(); // text model can be null e.g. if this is a binary file!
			}

			let viewStateOfSource: IEditorViewState;
			const activeEditor = editorService.getActiveEditor();
			const editor = getCodeEditor(activeEditor);
			if (editor) {
				const activeResource = toResource(activeEditor.input, { supportSideBySide: true });
				if (activeResource && (fileService.canHandleResource(activeResource) || resource.scheme === Schemas.untitled) && activeResource.toString() === resource.toString()) {
					viewStateOfSource = editor.saveViewState();
				}
			}

			// Special case: an untitled file with associated path gets saved directly unless "saveAs" is true
			let savePromise: TPromise<URI>;
			if (!isSaveAs && resource.scheme === Schemas.untitled && untitledEditorService.hasAssociatedFilePath(resource)) {
				savePromise = textFileService.save(resource).then((result) => {
					if (result) {
						return URI.file(resource.fsPath);
					}

					return null;
				});
			}

			// Otherwise, really "Save As..."
			else {
				savePromise = textFileService.saveAs(resource);
			}

			return savePromise.then((target) => {
				if (!target || target.toString() === resource.toString()) {
					return void 0; // save canceled or same resource used
				}

				const replaceWith: IResourceInput = {
					resource: target,
					encoding: encodingOfSource,
					options: {
						pinned: true,
						viewState: viewStateOfSource
					}
				};

				return editorService.replaceEditors([{
					toReplace: { resource: resource },
					replaceWith
				}]).then(() => true);
			});
		}

		// Pin the active editor if we are saving it
		const editor = editorService.getActiveEditor();
		const activeEditorResource = editor && editor.input && editor.input.getResource();
		if (activeEditorResource && activeEditorResource.toString() === resource.toString()) {
			editorGroupService.pinEditor(editor.position, editor.input);
		}

		// Just save
		return textFileService.save(resource, { force: true /* force a change to the file to trigger external watchers if any */ });
	}

	return TPromise.as(false);
}

function save(
	resource: URI | null,
	isSaveAs: boolean,
	options: ISaveOptions | undefined,
	editorService: IEditorService,
	fileService: IFileService,
	untitledEditorService: IUntitledEditorService,
	textFileService: ITextFileService,
	editorGroupService: IEditorGroupsService
): Promise<any> {

	function ensureForcedSave(options?: ISaveOptions): ISaveOptions {
		if (!options) {
			options = { force: true };
		} else {
			options.force = true;
		}

		return options;
	}

	if (resource && (fileService.canHandleResource(resource) || resource.scheme === Schemas.untitled)) {

		// Save As (or Save untitled with associated path)
		if (isSaveAs || resource.scheme === Schemas.untitled) {
			let encodingOfSource: string | undefined;
			if (resource.scheme === Schemas.untitled) {
				encodingOfSource = untitledEditorService.getEncoding(resource);
			} else if (fileService.canHandleResource(resource)) {
				const textModel = textFileService.models.get(resource);
				encodingOfSource = textModel && textModel.getEncoding(); // text model can be null e.g. if this is a binary file!
			}

			let viewStateOfSource: IEditorViewState | null;
			const activeTextEditorWidget = getCodeEditor(editorService.activeTextEditorWidget);
			if (activeTextEditorWidget) {
				const activeResource = toResource(editorService.activeEditor, { supportSideBySide: true });
				if (activeResource && (fileService.canHandleResource(activeResource) || resource.scheme === Schemas.untitled) && activeResource.toString() === resource.toString()) {
					viewStateOfSource = activeTextEditorWidget.saveViewState();
				}
			}

			// Special case: an untitled file with associated path gets saved directly unless "saveAs" is true
			let savePromise: Promise<URI | undefined>;
			if (!isSaveAs && resource.scheme === Schemas.untitled && untitledEditorService.hasAssociatedFilePath(resource)) {
				savePromise = textFileService.save(resource, options).then((result) => {
					if (result) {
						return resource.with({ scheme: Schemas.file });
					}

					return undefined;
				});
			}

			// Otherwise, really "Save As..."
			else {

				// Force a change to the file to trigger external watchers if any
				// fixes https://github.com/Microsoft/vscode/issues/59655
				options = ensureForcedSave(options);

				savePromise = textFileService.saveAs(resource, undefined, options);
			}

			return savePromise.then((target) => {
				if (!target || target.toString() === resource.toString()) {
					return false; // save canceled or same resource used
				}

				const replacement: IResourceInput = {
					resource: target,
					encoding: encodingOfSource,
					options: {
						pinned: true,
						viewState: viewStateOfSource || undefined
					}
				};

				return Promise.all(editorGroupService.groups.map(g =>
					editorService.replaceEditors([{
						editor: { resource },
						replacement
					}], g))).then(() => true);
			});
		}

		// Pin the active editor if we are saving it
		const activeControl = editorService.activeControl;
		const activeEditorResource = activeControl && activeControl.input && activeControl.input.getResource();
		if (activeControl && activeEditorResource && activeEditorResource.toString() === resource.toString()) {
			activeControl.group.pinEditor(activeControl.input);
		}

		// Just save (force a change to the file to trigger external watchers if any)
		options = ensureForcedSave(options);

		return textFileService.save(resource, options);
	}

	return Promise.resolve(false);
//.........这里部分代码省略.........

	contents.session.protocol.registerBufferProtocol(protocol, (request, callback: any) => {
		const requestPath = URI.parse(request.url).path;
		const normalizedPath = URI.file(requestPath);
		for (const root of getRoots()) {
			if (startsWith(normalizedPath.fsPath, root.fsPath + nativeSep)) {
				fileService.resolveContent(normalizedPath, { encoding: 'binary' }).then(contents => {
					const mime = getMimeType(normalizedPath);
					callback({
						data: Buffer.from(contents.value, contents.encoding),
						mimeType: mime
					});
				}, () => {
					callback({ error: -2 /* FAILED: https://cs.chromium.org/chromium/src/net/base/net_error_list.h */ });
				});
				return;
			}
		}
		console.error('Webview: Cannot load resource outside of protocol root');
		callback({ error: -10 /* ACCESS_DENIED: https://cs.chromium.org/chromium/src/net/base/net_error_list.h */ });
	}, (error) => {