ServerApplication
Defines server application for creating HttpServer
.
Default Configuration
The initial application is constructed with the following default configuration:
Key | Value |
---|---|
logger | scamper.logging.ConsoleLogger |
backlogSize | 50 |
poolSize | Runtime.getRuntime().availableProcessors() |
queueSize | Runtime.getRuntime().availableProcessors() * 4 |
bufferSize | 8192 |
readTimeout | 5000 |
headerLimit | 100 |
keepAlive | (Not configured) |
secure | (Not configured) |
trigger | (Not configured) |
incoming | (Not configured) |
outgoing | (Not configured) |
recover | (Sends 500 Internal Server Error ) |
Building HTTP Server
ServerApplication
is a mutable structure. With each applied change, the
application is modified and returned. After the desired configuration is
applied, a server is created using a factory method.
import java.io.File
import scala.language.implicitConversions
import scamper.http.{ BodyParser, stringToEntity }
import scamper.http.ResponseStatus.Registry.{ NotFound, NoContent, Ok }
import scamper.http.server.{ *, given }
// Get server application
val app = ServerApplication()
// Add request handler to log all requests
app.incoming { req =>
println(req.startLine)
req
}
// Add request handler for GET requests at specified path
app.get("/about") { req =>
Ok("This server is powered by Scamper.")
}
// Add request handler for PUT requests at specified path
app.put("/data/:id") { req =>
def update(id: Int, data: String): Boolean = ???
given BodyParser[String] = BodyParser.string()
// Get path parameter
val id = req.params.getInt("id")
update(id, req.as[String]) match
case true => NoContent()
case false => NotFound()
}
// Serve files from file directory
app.files("/main", File("/path/to/public"))
// Gzip response body if not empty
app.outgoing { res =>
res.body.isKnownEmpty match
case true => res
case false => res.setGzipContentEncoding()
}
// Create server
val server = app.create(8080)
try
printf("Host: %s%n", server.host)
printf("Port: %d%n", server.port)
// Run server for 60 seconds
Thread.sleep(60 * 1000)
finally
// Close server when done
server.close()
Value members
Concrete methods
Sets backlog size.
Sets backlog size.
The backlogSize
specifies the maximum number of incoming connections that
can wait before being accepted. Incoming connections that exceed this limit
are refused.
- Value Params
- size
backlog size
- Returns
this application
Sets buffer size.
Sets buffer size.
The bufferSize
specifies in bytes the size of buffer used when reading
from and writing to socket.
The bufferSize
also determines the maximum length of any header line.
Incoming requests containing a header that exceeds this limit are sent
431 (Request Header Fields Too Large).
- Value Params
- size
buffer size in bytes
- Returns
this application
- Note
bufferSize
is also used as the optimal chunk size when writing a response with chunked transfer encoding.
Creates server at given port.
Creates server at given port.
- Value Params
- port
port number
- Returns
new server
Creates server at given host and port.
Creates server at given host and port.
- Value Params
- host
host address
- port
port number
- Returns
new server
Creates server at given host and port.
Creates server at given host and port.
- Value Params
- host
host address
- port
port number
- Returns
new server
Sets header limit.
Sets header limit.
The headerLimit
specifies the maximum number of headers allowed. Incoming
requests containing headers that exceed this limit are sent
431 (Request Header Fields Too Large).
- Value Params
- limit
header limit
- Returns
this application
Adds supplied request handler.
Adds supplied request handler.
The handler is appended to existing request handler chain.
Adds supplied handler for requests with given router path and any of specified request methods.
Adds supplied handler for requests with given router path and any of specified request methods.
The handler is appended to existing request handler chain.
Enables persistent connections using specified parameters.
Enables persistent connections using specified parameters.
- Value Params
- params
keep-alive parameters
- Returns
this application
Enables persistent connections using specified timeout and max.
Enables persistent connections using specified timeout and max.
- Value Params
- max
maximum number of requests per connection
- timeout
idle timeout in seconds
- Returns
this application
Sets logger to given file.
Sets logger to given file.
- Value Params
- file
file to which server logs are written
- Returns
this application
- Note
If file exists, it is opened in append mode.
Sets logger.
Sets logger.
- Value Params
- logger
logger to which server logs are written
- Returns
this application
Adds supplied response filter.
Adds supplied response filter.
The filter is appended to existing response filter chain.
Sets pool size.
Sets pool size.
The poolSize
specifies the maximum number of requests processed
concurrently.
- Value Params
- size
pool size
- Returns
this application
Sets queue size.
Sets queue size.
The queueSize
specifies the maximum number of requests that can be queued
for processing. Incoming requests that exceed this limit are sent
503 (Service Unavailable).
- Value Params
- size
queue size
- Returns
this application
Sets read timeout.
Sets read timeout.
The readTimeout
specifies how long a read from a socket blocks before it
times out, whereafter 408 (Request Timeout) is sent to client.
- Value Params
- timeout
read timeout in milliseconds
- Returns
this application
Sets key store to be used for SSL/TLS.
Sets key store to be used for SSL/TLS.
- Value Params
- keyStore
server key store
- password
key store password
- storeType
key store type (i.e., JKS, JCEKS, etc.)
- Returns
this application
Sets key store to be used for SSL/TLS.
Sets key store to be used for SSL/TLS.
- Value Params
- keyStore
server key store
- password
key store password
- storeType
key store type (i.e., JKS, JCEKS, etc.)
- Returns
this application
- Note
The password can be discarded after invoking this method.
Sets key and certificate to be used for SSL/TLS.
Sets key and certificate to be used for SSL/TLS.
- Value Params
- certificate
public key certificate
- key
private key
- Returns
this application
Inherited methods
Adds supplied handler for DELETE requests to given router path.
Adds supplied handler for DELETE requests to given router path.
The handler is appended to existing request handler chain.
- Value Params
- handler
request handler
- path
router path
- Returns
this router
- Note
If request handler implements LifecycleHook, it is also added as a lifecycle hook.
- Inherited from
- Router
Mounts file server at given path.
Mounts file server at given path.
At request time, the mount path is stripped from the router path, and the remaining path is used to locate a file in the source directory.
File Mapping Examples
Mount Path | Source Directory | Router Path | Maps to |
---|---|---|---|
/images | /tmp | /images/logo.png | /tmp/logo.png |
/images | /tmp | /images/icons/warning.png | /tmp/icons/warning.png |
- Value Params
- defaults
default file names used when request matches directory
- path
router path at which directory is mounted
- source
directory from which files are served
- Returns
this router
- Note
If a request matches a directory, and if a file with one of the default file names exists in that directory, the server sends 303 (See Other) with a Location header value set to path of default file.
- Inherited from
- Router
Adds supplied handler for GET requests to given router path.
Adds supplied handler for GET requests to given router path.
The handler is appended to existing request handler chain.
- Value Params
- handler
request handler
- path
router path
- Returns
this router
- Note
If request handler implements LifecycleHook, it is also added as a lifecycle hook.
- Inherited from
- Router
Adds supplied handler for POST requests to given router path.
Adds supplied handler for POST requests to given router path.
The handler is appended to existing request handler chain.
- Value Params
- handler
request handler
- path
router path
- Returns
this router
- Note
If request handler implements LifecycleHook, it is also added as a lifecycle hook.
- Inherited from
- Router
Adds supplied handler for PUT requests to given router path.
Adds supplied handler for PUT requests to given router path.
The handler is appended to existing request handler chain.
- Value Params
- handler
request handler
- path
router path
- Returns
this router
- Note
If request handler implements LifecycleHook, it is also added as a lifecycle hook.
- Inherited from
- Router
Mounts router application at given path.
Mounts router application at given path.
- Value Params
- app
router application
- path
router path at which application is mounted
- Returns
this router
- Note
If router app implements LifecycleHook, it is also added as a lifecycle hook.
- Inherited from
- Router
Expands supplied router path to its absolute path.
Expands supplied router path to its absolute path.
- Value Params
- path
router path
- Throws
- java.lang.IllegalArgumentException
if router path is not
*
and does not begin with/
or if it escapes mount path
- Note
If
*
is supplied as router path, its absolute path is also*
.- Inherited from
- Router
Mounts WebSocket application at given path.
Mounts WebSocket application at given path.
- Value Params
- app
WebSocket application
- path
router path at which application is mounted
- Returns
this router
- Note
If WebSocket app implements LifecycleHook, it is also added as a lifecycle hook.
- Inherited from
- Router