restapi（4）- rest-mongo : MongoDB数据库前端的httpserver
完成了一套标准的rest风格数据库CRUD操作httpserver后发现有许多不足。主要是为了追求“通用”两个字，想把所有服务接口做的更“范generic”些，结果反而限制了目标数据库的特点，最终产生了一套功能弱小的玩具。比如说吧：标准rest风格getbyId需要所有的数据表都具备id这个字段，有点傻。然后get返回的结果集又没有什么灵活的控制方法如返回数量、字段、排序等。特别对MongoDB这样的在查询操作方面接近关系式数据库的分布式数据库：上篇提到过，它的query能力强大，条件组合灵活，如果不能在网络服务api中体现出来就太可惜了。所以，这篇博文会讨论一套专门针对MongoDB的rest-server。我想达到的目的是：后台数据库是MongoDB，通过httpserver提供对MongoDB的CRUD操作，客户端通过http调用CRUD服务。后台开发对每一个数据库表单使用统一的标准增添一套新的CRUD服务。希望如此能够提高开发效率，减少代码出错机会。
MongoDB是一种文件类型数据库，数据格式更加多样化。在这次示范里希望能把MongoDB有特点的数据类型以及它们的处理方法都介绍了，包括：日期类型，二进制类型blob（图片）等。顺便提一下：普通大型文本文件也可以用二进制blob方式存入MongoDB，因为文件在http传输过程中必须以byte方式进行，所以后台httpserver接收的文件格式是一串byte，不用任何格式转换就可以直接存入MongoDB blob字段。客户端从后台下载时就需要把bytes转换成UTF8字符就可以恢复文件内容了。
首先，我们先从Model开始，在scala里用case class来表示。Model是MongoDB Document的对应。在scala编程里我们是用case class 当作Document来操作的。我们设计的Model都会继承一个ModelBase trait：
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trait ModelBase[E] {
def to: E
}
case class Person(
userid: String = "",
name: String = "",
age: Option[Int] = None,
dob: Option[MGODate] = None, //生日
address: Option[String] = None
) extends ModelBase[Document] {
import org.mongodb.scala.bson._
override def to: Document = {
var doc = Document(
"userid" -> this.userid,
"name" -> this.name)
if (this.age != None)
doc = doc + ("age" -> this.age.get)
if (this.dob != None)
doc = doc + ("dob" -> this.dob.get)
if (this.address != None)
doc = doc + ("address" -> this.address.getOrElse(""))
doc
}
}
object Person {
val fromDocument: Document => Person = doc => {
val keyset = doc.keySet
Person(
userid = doc.getString("userid"),
name = doc.getString("name"),
age = mgoGetIntOrNone(doc,"age").asInstanceOf[Option[Int]],
dob = {if (keyset.contains("dob"))
Some(doc.getDate("dob"))
else None },
address = mgoGetStringOrNone(doc,"address")
)
}}
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在上面例子里Person对应MongoDB里一个Document。除了注意对应类型属性与表字段类型外，还提供了to,fromDecument两个转换函数。其中to函数是继承ModelBase的，代表所有MongoDB Model都必须具备to这个函数。这点很重要，因为在从json构建成Model时，如果属于ModelBase则肯定可以调用一个to函数：
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class MongoRoute[M <: ModelBase[Document]](val pathName: String)(repository: MongoRepo[M])(
...
post {
entity(as[String]) { json =>
val extractedEntity: M = fromJson[M](json)
val doc: Document = extractedEntity.to
val futmsg = repository.insert(doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(c) => c.toString()
case None => "insert may not complete!"
}
case Left(err) => err.getMessage
}
}复制代码
注意这个extractedEntity：我们现在还不能确定它的具体类型，是Person,Animal,Machine? 但我们确定它是M类型，而M<:ModalBase[Document]，所以M是MongoDB Model。可以调用extractedEntity.to获取一个Document。
仔细看，Person里并不包括blob类型字段。因为到现在我还没有想到办法在一个httprequest里把多个字段和图片一次性发出来，必须分两个request才能完成一个Document的上传。httpserver收到两个requests后还要进行requests的匹配对应管理，十分的复杂。所以含blob类型的Document只能把blob分拆到另一个Document里，然后用这个Document唯一一个id字段来链接：
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case class Photo (
id: String,
photo: Option[MGOBlob]
) extends ModelBase[Document] {
override def to: Document = {
var doc = Document("id" -> this.id)
if (photo != None)
doc = doc + ("photo" -> this.photo)
doc
}}
object Photo {
def fromDocument: Document => Photo = doc => {
val keyset = doc.keySet
Photo(
id = doc.getString("id"),
photo = mgoGetBlobOrNone(doc, "photo")
)
}}
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从另一个角度来讲，把blob和正常字段分开来存储也有一定的优势，最多也就是需要两次query罢了。
第二部分是repository：数据库操作函数：
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class MongoRepoR(implicit client: MongoClient) {
def getAll(next:Option[String],sort:Option[String],fields:Option[String],top:Option[Int]): DBOResult[Seq[R]] = {
var res = Seq[ResultOptions]()
next.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_FILTER,Some(Document(b)))}
sort.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_SORT,Some(Document(b)))}
fields.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_PROJECTION,Some(Document(b)))}
top.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_LIMIT,None,b)}
val ctxFind = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_QUERY)
.setCommand(Find(andThen = res))
mgoQuery[Seq[R]](ctxFind,converter)
}
def query(filtr: Bson, next:Option[String],sort:Option[String],fields:Option[String],top:Option[Int]): DBOResult[Seq[R]] = {
var res = Seq[ResultOptions]()
next.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_FILTER,Some(Document(b)))}
sort.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_SORT,Some(Document(b)))}
fields.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_PROJECTION,Some(Document(b)))}
top.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_LIMIT,None,b)}
val ctxFind = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_QUERY)
.setCommand(Find(filter = Some(filtr),andThen = res))
mgoQuery[Seq[R]](ctxFind,converter)
}
def getOneDocument(filtr: Bson): DBOResult[Document] = {
val ctxFind = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_QUERY)
.setCommand(Find(filter = Some(filtr),firstOnly = true))
mgoQuery[Document](ctxFind,converter)
}
def insert(doc: Document): DBOResult[Completed] = {
val ctxInsert = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Insert(Seq(doc)))
mgoUpdate[Completed](ctxInsert)
}
def delete(filter: Bson): DBOResult[DeleteResult] = {
val ctxDelete = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Delete(filter))
mgoUpdate[DeleteResult](ctxDelete)
}
def update(filter: Bson, update: Bson, many: Boolean): DBOResult[UpdateResult] = {
val ctxUpdate = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Update(filter,update,None,!many))
mgoUpdate[UpdateResult](ctxUpdate)
}
def replace(filter: Bson, row: Document): DBOResult[UpdateResult] = {
val ctxUpdate = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Replace(filter,row))
mgoUpdate[UpdateResult](ctxUpdate)
}
}
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这部分上篇博文讨论过。最后是akka-http的核心部分：Route。MongoDB CRUD服务对外的api：
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(get & parameters('filter.?,'fields.?,'sort.?,'top.as[Int].?,'next.?)) {
(filter,fields,sort,top,next) => {
dbor = {
filter match {
case Some(fltr) => repository.query(Document(fltr),next,sort,fields,top)
case None => repository.getAll(next,sort,fields,top)
}
}
val futRows = dbor.value.value.runToFuture.map {
eolr =>
eolr match {
case Right(olr) => olr match {
case Some(lr) => lr
case None => Seq[M]()
}
case Left(_) => Seq[M]()
}
}
complete(futureToJson(futRows))
}
} ~ post {
entity(as[String]) { json =>
val extractedEntity: M = fromJson[M](json)
val doc: Document = extractedEntity.to
val futmsg = repository.insert(doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(c) => c.toString()
case None => "insert may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futmsg)
}
} ~ (put & parameter('filter,'set.?, 'many.as[Boolean].?)) { (filter, set, many) =>
val bson = Document(filter)
if (set == None) {
entity(as[String]) { json =>
val extractedEntity: M = fromJson[M](json)
val doc: Document = extractedEntity.to
val futmsg = repository.replace(bson, doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(d) => s"${d.getMatchedCount} matched rows, ${d.getModifiedCount} rows updated."
case None => "update may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futureToJson(futmsg))
}
} else {
set match {
case Some(u) =>
val ubson = Document(u)
dbou = repository.update(bson, ubson, many.getOrElse(true))
case None =>
dbou = Left(new IllegalArgumentException("missing set statement for update!"))
}
val futmsg = dbou.value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(d) => s"${d.getMatchedCount} matched rows, ${d.getModifiedCount} rows updated."
case None => "update may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futureToJson(futmsg))
}
} ~ (delete & parameters('filter, 'many.as[Boolean].?)) { (filter,many) =>
val bson = Document(filter)
val futmsg = repository.delete(bson).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(d) => s"${d.getDeletedCount} rows deleted."
case None => "delete may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futureToJson(futmsg))
}
}复制代码
与上篇最大的区别就是这次的Route支持MongoDB特性的query string，bson类型的参数。如：
http://192.168.0.189:50081/private/crud/person
http://192.168.0.189:50081/private/crud/person?filter={"userid":"c001"}
http://192.168.0.189:50081/private/crud/person?sort={"userid":-1}
http://192.168.0.189:50081/private/crud/person?filter={"userid":{$gt:"c000"}}&sort={"userid":-1}&top=3
可惜的是bson表达式中有些字符是url禁止的，所以必须预先处理一下。可以用公网的UrlEncoder在线转换：
https://www.url-encoder.com {"userid":"c001"} -> %7B%22userid%22%3A%22c001%22%7D
在程序里可以用软件工具："com.github.tasubo" % "jurl-tools" % "0.6" URLEncode.encode(xyz)
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val sort =
"""
|{userid:-1}
""".stripMargin
val getAllRequest = HttpRequest(
HttpMethods.GET,
uri = "http://192.168.0.189:50081/public/crud/person?sort="+URLEncode.encode(sort),
).addHeader(authentication)复制代码
blob服务的api Route：
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pathPrefix("blob") {
(get & path(Remaining)) { id =>
val filtr = equal("id", id)
val futOptPic: CancelableFuture[Option[MGOBlob]] = repository.getOneDocument(filtr).value.value.runToFuture.map {
eodoc =>
eodoc match {
case Right(odoc) => odoc match {
case Some(doc) =>
if (doc == null) None
else mgoGetBlobOrNone(doc, "photo")
case None => None
}
case Left(_) => None
}
}
onComplete(futOptPic) {
case Success(optBlob) => optBlob match {
case Some(blob) =>
withoutSizeLimit {
encodeResponseWith(Gzip) {
complete(
HttpEntity(
ContentTypes.`application/octet-stream`,
ByteArrayToSource(blob.getData))
)
}
}
case None => complete(StatusCodes.NotFound)
}
case Failure(err) => complete(err)
}
} ~
(post & parameter('id)) { id =>
withoutSizeLimit {
decodeRequest {
extractDataBytes { bytes =>
val fut = bytes.runFold(ByteString()) { case (hd, bs) =>
hd ++ bs
}
onComplete(fut) {
case Success(b) =>
val doc = Document("id" -> id, "photo" -> b.toArray)
val futmsg = repository.insert(doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(c) => c.toString()
case None => "insert may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futmsg)
case Failure(err) => complete(err)
}
}
}
}
}
} 复制代码
注意：MongoRoute[M]是个范类型。我希望对任何Model的Route只需要指定M即可，如：
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implicit val personDao = new MongoRepoPerson)
implicit val picDao = new MongoRepoPhoto
...
pathPrefix("public") {
(pathPrefix("crud")) {
new MongoRoute[Person]("person")(personDao)
.route ~
new MongoRoute[Photo]("photo")(picDao)
.route
}
}复制代码
是否省力多了？但是，回到原来问题：blob类型在整个移动过程中都不需要进行格式转换。所以id字段名称是指定的，这点在设计表结构时要注意。
如何测试一个httpserver还是比较头痛的。用浏览器只能测试GET，其它POST,PUT,DELETE应该怎么测试？其实可以用curl：
curl -i -X GET http://rest-api.io/items
curl -i -X GET http://rest-api.io/items/5069b47aa892630aae059584
curl -i -X DELETE http://rest-api.io/items/5069b47aa892630aae059584
curl -i -X POST -H 'Content-Type: application/json' -d '{"name": "New item", "year": "2009"}' http://rest-api.io/items
curl -i -X PUT -H 'Content-Type: application/json' -d '{"name": "Updated item", "year": "2010"}' http://rest-api.io/items/5069b47aa892630aae059584
下面写两个客户端分别测试crud和blob：
TestCrudClient.scala
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import akka.actor._
import akka.http.scaladsl.model.headers._
import scala.concurrent._
import scala.concurrent.duration._
import akka.http.scaladsl.Http
import akka.http.scaladsl.marshalling._
import akka.http.scaladsl.model._
import akka.stream.ActorMaterializer
import com.github.tasubo.jurl.URLEncode
import com.datatech.rest.mongo.MongoModels.Person
import de.heikoseeberger.akkahttpjson4s.Json4sSupport
import org.json4s.jackson
import com.datatech.sdp.mongo.engine.MGOClasses._
trait JsonCodec extends Json4sSupport {
import org.json4s.DefaultFormats
import org.json4s.ext.JodaTimeSerializers
implicit val serilizer = jackson.Serialization
implicit val formats = DefaultFormats ++ JodaTimeSerializers.all
}
object JsConverters extends JsonCodec
object TestCrudClient {
type UserInfo = Map[String,Any]
def main(args: Array[String]): Unit = {
import JsConverters._
implicit val system = ActorSystem()
implicit val materializer = ActorMaterializer()
// needed for the future flatMap/onComplete in the end
implicit val executionContext = system.dispatcher
val authorization = headers.Authorization(BasicHttpCredentials("johnny", "p4ssw0rd"))
val authRequest = HttpRequest(
HttpMethods.POST,
uri = "http://192.168.0.189:50081/auth",
headers = List(authorization)
)
val futToken: Future[HttpResponse] = Http().singleRequest(authRequest)
val respToken = for {
resp <- futToken
jstr <- resp.entity.dataBytes.runFold("") {(s,b) => s + b.utf8String}
} yield jstr
val jstr = Await.result[String](respToken,2 seconds)
println(jstr)
scala.io.StdIn.readLine()
val authentication = headers.Authorization(OAuth2BearerToken(jstr))
val sort =
"""
|{userid:-1}
""".stripMargin
val getAllRequest = HttpRequest(
HttpMethods.GET,
uri = "http://192.168.0.189:50081/public/crud/person?sort="+URLEncode.encode(sort),
).addHeader(authentication)
val futGetAll: Future[HttpResponse] = Http().singleRequest(getAllRequest)
println(Await.result(futGetAll,2 seconds))
scala.io.StdIn.readLine()
var bf =
"""
|{"userid":"c888"}
""".stripMargin
println(URLEncode.encode(bf))
val delRequest = HttpRequest(
HttpMethods.DELETE,
uri = "http://192.168.0.189:50081/public/crud/person?filter="+URLEncode.encode(bf)
).addHeader(authentication)
val futDel: Future[HttpResponse] = Http().singleRequest(delRequest)
println(Await.result(futDel,2 seconds))
scala.io.StdIn.readLine()
bf =
"""
|{"userid":"c001"}
""".stripMargin
val getRequest = HttpRequest(
HttpMethods.GET,
uri = "http://192.168.0.189:50081/public/crud/person?filter="+URLEncode.encode(bf),
).addHeader(authentication)
val futGet: Future[HttpResponse] = Http().singleRequest(getRequest)
println(Await.result(futGet,2 seconds))
scala.io.StdIn.readLine()
val tiger = Person("c001","tiger chan",Some(56))
val john = Person("c002", "johnny dep", Some(60))
val peter = Person("c003", "pete brad", Some(58))
val susan = Person("c004", "susan boyr", Some(68),Some(mgoDate(1950,11,5)) )
val ns = Person("c004", "susan boyr", Some(68),Some(mgoDate(1950,11,5)) )
val saveRequest = HttpRequest(
HttpMethods.POST,
uri = "http://192.168.0.189:50081/public/crud/person"
).addHeader(authentication)
val futPost: Future[HttpResponse] =
for {
reqEntity <- Marshal(peter).to[RequestEntity]
response <- Http().singleRequest(saveRequest.copy(entity=reqEntity))
} yield response
println(Await.result(futPost,2 seconds))
scala.io.StdIn.readLine()
var set =
"""
| {$set:
| {
| name:"tiger the king",
| age:18
| }
| }
""".stripMargin
val updateRequest = HttpRequest(
HttpMethods.PUT,
uri = "http://192.168.0.189:50081/public/crud/person?filter="+URLEncode.encode(
bf)+"&set="+URLEncode.encode(set)+"&many=true"
).addHeader(authentication)
val futUpdate: Future[HttpResponse] = Http().singleRequest(updateRequest)
println(Await.result(futUpdate,2 seconds))
scala.io.StdIn.readLine()
val repRequest = HttpRequest(
HttpMethods.PUT,
uri = "http://192.168.0.189:50081/public/crud/person?filter="+URLEncode.encode(bf)
).addHeader(authentication)
val futReplace: Future[HttpResponse] =
for {
reqEntity <- Marshal(susan).to[RequestEntity]
response <- Http().singleRequest(updateRequest.copy(entity=reqEntity))
} yield response
println(Await.result(futReplace,2 seconds))
scala.io.StdIn.readLine()
system.terminate()
}
}
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TestFileClient.scala
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import akka.stream._
import java.nio.file._
import java.io._
import akka.http.scaladsl.model.headers._
import scala.concurrent._
import com.datatech.rest.mongo.FileStreaming._
import scala.concurrent.duration._
import akka.actor.ActorSystem
import akka.http.scaladsl.marshalling.Marshal
import akka.http.scaladsl.model._
import akka.http.scaladsl.Http
import akka.stream.scaladsl.{FileIO, Source}
import scala.util._
case class FileUtil(implicit sys: ActorSystem) {
import sys.dispatcher
implicit val mat = ActorMaterializer()
def createEntity(file: File): RequestEntity = {
require(file.exists())
val formData =
Multipart.FormData(
Source.single(
Multipart.FormData.BodyPart(
"test",
HttpEntity(MediaTypes.`application/octet-stream`, file.length(), FileIO.fromPath(file.toPath, chunkSize = 100000)), // the chunk size here is currently critical for performance
Map("filename" -> file.getName))))
Await.result(Marshal(formData).to[RequestEntity], 3 seconds)}
def uploadFile(request: HttpRequest, dataEntity: RequestEntity) = {
implicit val mat = ActorMaterializer()
import sys.dispatcher
val futResp = Http(sys).singleRequest(
// Gzip.encodeMessage(
request.copy(entity = dataEntity) //.addHeader(`Content-Encoding`(HttpEncodings.gzip))
// )
)
futResp
.andThen {
case Success(r@HttpResponse(StatusCodes.OK, _, entity, _)) =>
entity.dataBytes.map(_.utf8String).runForeach(println)
case Success(r@HttpResponse(code, _, _, _)) =>
println(s"Upload request failed, response code: $code")
r.discardEntityBytes()
case Success(_) => println("Unable to Upload file!")
case Failure(err) => println(s"Upload failed: ${err.getMessage}")
}}
def downloadFileTo(request: HttpRequest, destPath: String) = {
// val req = request.addHeader(`Content-Encoding`(HttpEncodings.gzip))
val futResp = Http(sys).singleRequest(request) //.map(Gzip.decodeMessage(_))
futResp
.andThen {
case Success(r@HttpResponse(StatusCodes.OK, _, entity, _)) =>
entity.withoutSizeLimit().dataBytes.runWith(FileIO.toPath(Paths.get(destPath)))
.onComplete { case _ => println(s"Download file saved to: $destPath") }
case Success(r@HttpResponse(code, _, _, _)) =>
println(s"Download request failed, response code: $code")
r.discardEntityBytes()
case Success(_) => println("Unable to download file!")
case Failure(err) => println(s"Download failed: ${err.getMessage}")
}
}
}
object TestFileClient {
type UserInfo = Map[String,Any]
def main(args: Array[String]): Unit = {
implicit val system = ActorSystem()
implicit val materializer = ActorMaterializer()
// needed for the future flatMap/onComplete in the end
implicit val executionContext = system.dispatcher
val helloRequest = HttpRequest(uri = "http://192.168.0.189:50081/")
val authorization = headers.Authorization(BasicHttpCredentials("johnny", "p4ssw0rd"))
val authRequest = HttpRequest(
HttpMethods.POST,
uri = "http://192.168.0.189:50081/auth",
headers = List(authorization)
)
val futToken: Future[HttpResponse] = Http().singleRequest(authRequest)
val respToken = for {
resp <- futToken
jstr <- resp.entity.dataBytes.runFold("") {(s,b) => s + b.utf8String}
} yield jstr
val jstr = Await.result[String](respToken,2 seconds)
println(jstr)
scala.io.StdIn.readLine()
val authentication = headers.Authorization(OAuth2BearerToken(jstr))
val entity = HttpEntity(
ContentTypes.`application/octet-stream`,
fileStreamSource("/Users/tiger/pictures/MeTiger.png",1024)
)
//
val chunked = HttpEntity.Chunked.fromData(
ContentTypes.`application/octet-stream`,
fileStreamSource("/Users/tiger/pictures/MeTiger.png",1024)
)
val uploadRequest = HttpRequest(
HttpMethods.POST,// uri = "http://192.168.0.189:50081/private/file?filename=tiger.jpg",
uri = "http://192.168.0.189:50081/public/crud/photo/blob?id=tiger.jpg",
).addHeader(authentication)
//upload file
Await.ready(FileUtil().uploadFile(uploadRequest,entity),2 seconds)
//Await.ready(FileUtil().uploadFile(uploadRequest,chunked),2 seconds)
val dlRequest = HttpRequest(
HttpMethods.GET,// uri = "http://192.168.0.189:50081/api/file/mypic.jpg",
uri = "http://192.168.0.189:50081/public/crud/photo/blob/tiger.jpg",
).addHeader(authentication)
FileUtil().downloadFileTo(dlRequest, "/users/tiger-macpro/cert3/mypic.jpg")
scala.io.StdIn.readLine()
system.terminate()}
}
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下面是本次示范中的源代码：
build.sbt
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name := "rest-mongo"
version := "0.1"
scalaVersion := "2.12.8"
scalacOptions += "-Ypartial-unification"
val akkaVersion = "2.5.23"
val akkaHttpVersion = "10.1.8"
libraryDependencies ++= Seq(
"com.typesafe.akka" %% "akka-http" % "10.1.8",
"com.typesafe.akka" %% "akka-stream" % "2.5.23",
"com.pauldijou" %% "jwt-core" % "3.0.1",
"de.heikoseeberger" %% "akka-http-json4s" % "1.22.0",
"org.json4s" %% "json4s-native" % "3.6.1",
"com.typesafe.akka" %% "akka-http-spray-json" % "10.1.8",
"com.typesafe.scala-logging" %% "scala-logging" % "3.9.0",
"org.slf4j" % "slf4j-simple" % "1.7.25",
"org.json4s" %% "json4s-jackson" % "3.6.7",
"org.json4s" %% "json4s-ext" % "3.6.7",
// for scalikejdbc
"org.scalikejdbc" %% "scalikejdbc" % "3.2.1",
"org.scalikejdbc" %% "scalikejdbc-test" % "3.2.1" % "test",
"org.scalikejdbc" %% "scalikejdbc-config" % "3.2.1",
"org.scalikejdbc" %% "scalikejdbc-streams" % "3.2.1",
"org.scalikejdbc" %% "scalikejdbc-joda-time" % "3.2.1",
"com.h2database" % "h2" % "1.4.199",
"com.zaxxer" % "HikariCP" % "2.7.4",
"com.jolbox" % "bonecp" % "0.8.0.RELEASE",
"com.typesafe.slick" %% "slick" % "3.3.2",
//for cassandra 3.6.0
"com.datastax.cassandra" % "cassandra-driver-core" % "3.6.0",
"com.datastax.cassandra" % "cassandra-driver-extras" % "3.6.0",
"com.lightbend.akka" %% "akka-stream-alpakka-cassandra" % "1.1.0",
//for mongodb 4.0
"org.mongodb.scala" %% "mongo-scala-driver" % "2.6.0",
"com.lightbend.akka" %% "akka-stream-alpakka-mongodb" % "1.1.0",
"ch.qos.logback" % "logback-classic" % "1.2.3",
"io.monix" %% "monix" % "3.0.0-RC3",
"org.typelevel" %% "cats-core" % "2.0.0-M4",
"com.github.tasubo" % "jurl-tools" % "0.6"
)
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MongoHttpServer.scala
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package com.datatech.rest.mongo
import akka.actor._
import akka.stream._
import akka.http.scaladsl.Http
import akka.http.scaladsl.server.Directives._
import pdi.jwt._
import AuthBase._
import MockUserAuthService._
import org.mongodb.scala._
import scala.collection.JavaConverters._
import MongoModels._
import MongoRepo._
import MongoRoute._
object MongoHttpServer extends App {
implicit val httpSys = ActorSystem("httpSystem")
implicit val httpMat = ActorMaterializer()
implicit val httpEC = httpSys.dispatcher
val settings: MongoClientSettings = MongoClientSettings.builder()
.applyToClusterSettings(b => b.hosts(List(new ServerAddress("localhost")).asJava))
.build()implicit val client: MongoClient = MongoClient(settings)
implicit val personDao = new MongoRepoPerson)
implicit val picDao = new MongoRepoPhoto
implicit val authenticator = new AuthBase()
.withAlgorithm(JwtAlgorithm.HS256)
.withSecretKey("OpenSesame")
.withUserFunc(getValidUser)
val route =
path("auth") {
authenticateBasic(realm = "auth", authenticator.getUserInfo) { userinfo =>
post { complete(authenticator.issueJwt(userinfo))}
}
} ~
pathPrefix("private") {
authenticateOAuth2(realm = "private", authenticator.authenticateToken) { validToken =>
FileRoute(validToken)
.route
// ~ ...
}
} ~
pathPrefix("public") {
(pathPrefix("crud")) {
new MongoRoute[Person]("person")(personDao)
.route ~
new MongoRoute[Photo]("photo")(picDao)
.route
}
}
val (port, host) = (50081,"192.168.0.189")
val bindingFuture = Http().bindAndHandle(route,host,port)
println(s"Server running at $host $port. Press any key to exit ...")
scala.io.StdIn.readLine()
bindingFuture.flatMap(_.unbind())
.onComplete(_ => httpSys.terminate())
}
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ModalBase.scala
package com.datatech.rest.mongo
trait ModelBase[E] {
def to: E
}
MongoModel.scala
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package com.datatech.rest.mongo
import org.mongodb.scala._
import com.datatech.sdp.mongo.engine._
import MGOClasses._
object MongoModels {
case class Person(
userid: String = "",
name: String = "",
age: Option[Int] = None,
dob: Option[MGODate] = None,
address: Option[String] = None
) extends ModelBase[Document] {
import org.mongodb.scala.bson._
override def to: Document = {
var doc = Document(
"userid" -> this.userid,
"name" -> this.name)
if (this.age != None)
doc = doc + ("age" -> this.age.get)
if (this.dob != None)
doc = doc + ("dob" -> this.dob.get)
if (this.address != None)
doc = doc + ("address" -> this.address.getOrElse(""))
doc
}
}
object Person {
val fromDocument: Document => Person = doc => {
val keyset = doc.keySet
Person(
userid = doc.getString("userid"),
name = doc.getString("name"),
age = mgoGetIntOrNone(doc,"age").asInstanceOf[Option[Int]],
dob = {if (keyset.contains("dob"))
Some(doc.getDate("dob"))
else None },
address = mgoGetStringOrNone(doc,"address")
)
}}
case class Photo (
id: String,
photo: Option[MGOBlob]
) extends ModelBase[Document] {
override def to: Document = {
var doc = Document("id" -> this.id)
if (photo != None)
doc = doc + ("photo" -> this.photo)
doc
}}
object Photo {
def fromDocument: Document => Photo = doc => {
val keyset = doc.keySet
Photo(
id = doc.getString("id"),
photo = mgoGetBlobOrNone(doc, "photo")
)
}}
}
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MongoRepo.scala
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package com.datatech.rest.mongo
import org.mongodb.scala._
import org.bson.conversions.Bson
import org.mongodb.scala.result._
import com.datatech.sdp.mongo.engine._
import MGOClasses._
import MGOEngine._
import MGOCommands._
import com.datatech.sdp.result.DBOResult.DBOResult
import MongoModels._
object MongoRepo {
class MongoRepoR(implicit client: MongoClient) {
def getAll(next:Option[String],sort:Option[String],fields:Option[String],top:Option[Int]): DBOResult[Seq[R]] = {
var res = Seq[ResultOptions]()
next.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_FILTER,Some(Document(b)))}
sort.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_SORT,Some(Document(b)))}
fields.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_PROJECTION,Some(Document(b)))}
top.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_LIMIT,None,b)}
val ctxFind = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_QUERY)
.setCommand(Find(andThen = res))
mgoQuery[Seq[R]](ctxFind,converter)
}
def query(filtr: Bson, next:Option[String],sort:Option[String],fields:Option[String],top:Option[Int]): DBOResult[Seq[R]] = {
var res = Seq[ResultOptions]()
next.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_FILTER,Some(Document(b)))}
sort.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_SORT,Some(Document(b)))}
fields.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_PROJECTION,Some(Document(b)))}
top.foreach {b => res = res :+ ResultOptions(FOD_TYPE.FOD_LIMIT,None,b)}
val ctxFind = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_QUERY)
.setCommand(Find(filter = Some(filtr),andThen = res))
mgoQuery[Seq[R]](ctxFind,converter)
}
def getOneDocument(filtr: Bson): DBOResult[Document] = {
val ctxFind = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_QUERY)
.setCommand(Find(filter = Some(filtr),firstOnly = true))
mgoQuery[Document](ctxFind,converter)
}
def insert(doc: Document): DBOResult[Completed] = {
val ctxInsert = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Insert(Seq(doc)))
mgoUpdate[Completed](ctxInsert)
}
def delete(filter: Bson): DBOResult[DeleteResult] = {
val ctxDelete = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Delete(filter))
mgoUpdate[DeleteResult](ctxDelete)
}
def update(filter: Bson, update: Bson, many: Boolean): DBOResult[UpdateResult] = {
val ctxUpdate = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Update(filter,update,None,!many))
mgoUpdate[UpdateResult](ctxUpdate)
}
def replace(filter: Bson, row: Document): DBOResult[UpdateResult] = {
val ctxUpdate = MGOContext(dbName = db,collName=coll)
.setActionType(MGO_ACTION_TYPE.MGO_UPDATE)
.setCommand(Replace(filter,row))
mgoUpdate[UpdateResult](ctxUpdate)
}
}
}
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MongoRoute.scala
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package com.datatech.rest.mongo
import akka.http.scaladsl.server.Directives
import scala.util._
import org.mongodb.scala._
import com.datatech.sdp.file.Streaming._
import org.mongodb.scala.result._
import MongoRepo._
import akka.stream.ActorMaterializer
import com.datatech.sdp.result.DBOResult._
import org.mongodb.scala.model.Filters._
import com.datatech.sdp.mongo.engine.MGOClasses._
import monix.execution.CancelableFuture
import akka.util._
import akka.http.scaladsl.model._
import akka.http.scaladsl.coding.Gzip
object MongoRoute {
class MongoRoute[M <: ModelBase[Document]](val pathName: String)(repository: MongoRepo[M])(
implicit c: MongoClient, m: Manifest[M], mat: ActorMaterializer) extends Directives with JsonConverter {
import monix.execution.Scheduler.Implicits.global
var dbor: DBOResult[Seq[M]] = _
var dbou: DBOResult[UpdateResult] = _
val route = pathPrefix(pathName) {
pathPrefix("blob") {
(get & path(Remaining)) { id =>
val filtr = equal("id", id)
val futOptPic: CancelableFuture[Option[MGOBlob]] = repository.getOneDocument(filtr).value.value.runToFuture.map {
eodoc =>
eodoc match {
case Right(odoc) => odoc match {
case Some(doc) =>
if (doc == null) None
else mgoGetBlobOrNone(doc, "photo")
case None => None
}
case Left(_) => None
}
}
onComplete(futOptPic) {
case Success(optBlob) => optBlob match {
case Some(blob) =>
withoutSizeLimit {
encodeResponseWith(Gzip) {
complete(
HttpEntity(
ContentTypes.`application/octet-stream`,
ByteArrayToSource(blob.getData))
)
}
}
case None => complete(StatusCodes.NotFound)
}
case Failure(err) => complete(err)
}
} ~
(post & parameter('id)) { id =>
withoutSizeLimit {
decodeRequest {
extractDataBytes { bytes =>
val fut = bytes.runFold(ByteString()) { case (hd, bs) =>
hd ++ bs
}
onComplete(fut) {
case Success(b) =>
val doc = Document("id" -> id, "photo" -> b.toArray)
val futmsg = repository.insert(doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(c) => c.toString()
case None => "insert may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futmsg)
case Failure(err) => complete(err)
}
}
}
}
}
} ~
(get & parameters('filter.?,'fields.?,'sort.?,'top.as[Int].?,'next.?)) {
(filter,fields,sort,top,next) => {
dbor = {
filter match {
case Some(fltr) => repository.query(Document(fltr),next,sort,fields,top)
case None => repository.getAll(next,sort,fields,top)
}
}
val futRows = dbor.value.value.runToFuture.map {
eolr =>
eolr match {
case Right(olr) => olr match {
case Some(lr) => lr
case None => Seq[M]()
}
case Left(_) => Seq[M]()
}
}
complete(futureToJson(futRows))
}
} ~ post {
entity(as[String]) { json =>
val extractedEntity: M = fromJson[M](json)
val doc: Document = extractedEntity.to
val futmsg = repository.insert(doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(c) => c.toString()
case None => "insert may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futmsg)
}
} ~ (put & parameter('filter,'set.?, 'many.as[Boolean].?)) { (filter, set, many) =>
val bson = Document(filter)
if (set == None) {
entity(as[String]) { json =>
val extractedEntity: M = fromJson[M](json)
val doc: Document = extractedEntity.to
val futmsg = repository.replace(bson, doc).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(d) => s"${d.getMatchedCount} matched rows, ${d.getModifiedCount} rows updated."
case None => "update may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futureToJson(futmsg))
}
} else {
set match {
case Some(u) =>
val ubson = Document(u)
dbou = repository.update(bson, ubson, many.getOrElse(true))
case None =>
dbou = Left(new IllegalArgumentException("missing set statement for update!"))
}
val futmsg = dbou.value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(d) => s"${d.getMatchedCount} matched rows, ${d.getModifiedCount} rows updated."
case None => "update may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futureToJson(futmsg))
}
} ~ (delete & parameters('filter, 'many.as[Boolean].?)) { (filter,many) =>
val bson = Document(filter)
val futmsg = repository.delete(bson).value.value.runToFuture.map {
eoc =>
eoc match {
case Right(oc) => oc match {
case Some(d) => s"${d.getDeletedCount} rows deleted."
case None => "delete may not complete!"
}
case Left(err) => err.getMessage
}
}
complete(futureToJson(futmsg))
}
}}
}
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