Swift 如何使用Vapor对图像进行响应?
我只想有一个控制器操作,基本上与通过Swift 如何使用Vapor对图像进行响应?,swift,vapor,Swift,Vapor,我只想有一个控制器操作,基本上与通过Public/文件夹直接访问图像的操作相同。不同之处在于,路由可以是任何您想要的,并且返回的图像将是控制器函数内部确定的图像。但如何做出正确的反应呢 我的方法如下: import Vapor final class ImageController { func read(_ req: Request) throws -> Future<Data> { let directory = DirectoryConfig.d
Public/
文件夹直接访问图像的操作相同。不同之处在于,路由可以是任何您想要的,并且返回的图像将是控制器函数内部确定的图像。但如何做出正确的反应呢
我的方法如下:
import Vapor
final class ImageController {
func read(_ req: Request) throws -> Future<Data> {
let directory = DirectoryConfig.detect()
let promise = req.eventLoop.newPromise(Data.self)
req.eventLoop.execute {
do {
let data = try Data(contentsOf: URL(fileURLWithPath: directory.workDir)
.appendingPathComponent("Public", isDirectory: true)
.appendingPathComponent("image.png"))
promise.succeed(result: data)
} catch {
promise.fail(error: error)
}
}
return promise.futureResult
// try req.content.encode(data, as: .png)
}
}
导入蒸汽
最终类图像控制器{
func read(请求)抛出->未来{
let directory=DirectoryConfig.detect()
让promise=req.eventLoop.newPromise(Data.self)
req.eventLoop.execute{
做{
let data=try data(contentsOf:URL(fileURLWithPath:directory.workDir)
.appendingPathComponent(“Public”,isDirectory:true)
.appendingPathComponent(“image.png”))
承诺。成功(结果:数据)
}抓住{
承诺失败(错误:错误)
}
}
回报承诺。未来的结果
//try req.content.encode(数据格式为:.png)
}
}
但在我看来,我把它复杂化了,是吗?另外两种方法:
route.get("/my/random/route") {
request -> Future<View> in
return try request.view().render("image", ["imgname":"image.png"])
}
但是如何创建正确的响应? 直接创建一个
响应
并设置媒体类型
:请求.makeResponse(数据,如:MediaType.png)
例如:
struct ImageController: RouteCollection {
func boot(router: Router) throws {
let imageRoutes = router.grouped("images")
// GET /images/get-test-image
imageRoutes.get("get-test-image", use: getTestImage)
}
func getTestImage(_ request: Request) throws -> Response {
// add controller code here
// to determine which image is returned
let filePath = "/path/to/image18.png"
let fileUrl = URL(fileURLWithPath: filePath)
do {
let data = try Data(contentsOf: fileUrl)
// makeResponse(body: LosslessHTTPBodyRepresentable, as: MediaType)
let response: Response = request.makeResponse(data, as: MediaType.png)
return response
} catch {
let response: Response = request.makeResponse("image not available")
return response
}
}
}
你知道如何在蒸汽4中制造同样的东西吗?
route.get("/my/random/route") {
request -> Response in
return request.redirect(to: "/image.png")
}
struct ImageController: RouteCollection {
func boot(router: Router) throws {
let imageRoutes = router.grouped("images")
// GET /images/get-test-image
imageRoutes.get("get-test-image", use: getTestImage)
}
func getTestImage(_ request: Request) throws -> Response {
// add controller code here
// to determine which image is returned
let filePath = "/path/to/image18.png"
let fileUrl = URL(fileURLWithPath: filePath)
do {
let data = try Data(contentsOf: fileUrl)
// makeResponse(body: LosslessHTTPBodyRepresentable, as: MediaType)
let response: Response = request.makeResponse(data, as: MediaType.png)
return response
} catch {
let response: Response = request.makeResponse("image not available")
return response
}
}
}