R RestRserve 将 Etag 添加到静态路径
假设我有一个像这样使用 RestRserve 的 REST API，有没有办法添加 Etag 以在云服务上启用缓存？
writeLines("Hello World", "myfile.txt")
app <- Application$new(content_type = "application/json")
app$add_static("/", ".")
backend <- BackendRserve$new()
# backend$start(app, http_port = 8080)
req <- Request$new(path = "/myfile.txt", method = "GET")
app$process_request(req)$headers
#> $Server
#> [1] "RestRserve/0.4.1001"
正如我们所见，没有 Etag。
使用Go Fiber的示例
使用GO Fiber，我会像这样使用它：
package main
import (
"flag"
"log"
"github.com/gofiber/fiber/v2"
"github.com/gofiber/fiber/v2/middleware/etag"
)
var (
port = flag.String("port", ":3000", "Port to listen on")
)
func main() {
app := fiber.New()
app.Use(etag.New())
app.Static("/", ".")
log.Fatal(app.Listen(*port))
}
然后查询localhost:3000/myfile.txt我会看到这样的标头
HTTP/1.1 200 OK
Date: Fri, 18 Mar 2022 13:13:44 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 12
Last-Modified: Fri, 21 Jan 2022 16:24:47 GMT
Etag: "12-823400506"
Connection: close
Hello World
有没有一种方法可以使用将Etag标头添加到静态文件中休息保留吗？
Let's say I have a REST API using RestRserve like this, is there a way to add an Etag to enable caching on cloud services?
writeLines("Hello World", "myfile.txt")
app <- Application$new(content_type = "application/json")
app$add_static("/", ".")
backend <- BackendRserve$new()
# backend$start(app, http_port = 8080)
req <- Request$new(path = "/myfile.txt", method = "GET")
app$process_request(req)$headers
#> $Server
#> [1] "RestRserve/0.4.1001"
As we see, there is no Etag.
Example using Go fiber
Using GO fiber, I would use it like this:
package main
import (
"flag"
"log"
"github.com/gofiber/fiber/v2"
"github.com/gofiber/fiber/v2/middleware/etag"
)
var (
port = flag.String("port", ":3000", "Port to listen on")
)
func main() {
app := fiber.New()
app.Use(etag.New())
app.Static("/", ".")
log.Fatal(app.Listen(*port))
}
and then querying localhost:3000/myfile.txt I would see headers like this
HTTP/1.1 200 OK
Date: Fri, 18 Mar 2022 13:13:44 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 12
Last-Modified: Fri, 21 Jan 2022 16:24:47 GMT
Etag: "12-823400506"
Connection: close
Hello World
Is there a way to add Etag headers to static files using RestRserve?
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从 RestRserve 版本 1.1.1（在 CRAN 上）开始，有一个 ETag 中间件类。
像这样使用它：
另请参阅 https://restrserve.org/reference/ETagMiddleware.html
As of RestRserve version 1.1.1 (on CRAN), there is an ETag Middleware class.
Use it like so:
See also https://restrserve.org/reference/ETagMiddleware.html