commit 988a94141f0accd98ed2b29ee7b3d7db7d57f8f6
Author: Felix Ableitner <me@nutomic.com>
Date:   Fri Apr 27 15:18:37 2018 +0200

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ddd6656
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+/.gradle/
+/.idea/
+/build/
+/database.mv.db
+/database.trace.db
+/server/build/
+/server/out/
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2f29493
--- /dev/null
+++ b/README.md
@@ -0,0 +1,22 @@
+Siapics
+=======
+
+Install
+-------
+
+First, you need to install Sia and execute `siad`. After block synchronization is complete (check with `siac` command),
+you have to put some Sia coins into the wallet, and unlock the wallet.
+    https://github.com/dvstate/minio#install-sia-daemon
+
+When this is all done, you are ready to set up Minio. Execute the following commands:
+
+```
+MINIO_ACCESS_KEY=*username*
+MINIO_SECRET_KEY=*password*
+minio gateway sia
+```
+
+Now, install siapics on the server, and execute `siapics --minio-user *username* --minio-password *password*`. It will
+listen on `http://localhost:9191`. To access siapics from another device, you need to set up a proxy server, like Nginx.
+
+You can browse the existing files at `http://localhost:9000`, with the above username and password.
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..7020065
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,24 @@
+buildscript {
+    ext.kotlin_version = '1.2.31'
+
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+group 'com.siapics'
+version '0.1'
+
+apply plugin: 'kotlin'
+
+sourceCompatibility = 1.8
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..01b8bf6
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..933b647
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-bin.zip
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..cccdd3d
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..e95643d
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,84 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/server/build.gradle b/server/build.gradle
new file mode 100644
index 0000000..2590766
--- /dev/null
+++ b/server/build.gradle
@@ -0,0 +1,43 @@
+buildscript {
+    ext.kotlin_version = '1.2.31'
+
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+group 'com.siapics'
+version '0.1'
+
+apply plugin: 'java'
+apply plugin: 'kotlin'
+
+sourceCompatibility = 1.8
+
+repositories {
+    jcenter()
+    maven { url "https://dl.bintray.com/kotlin/exposed" }
+}
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    compile 'io.minio:minio:3.0.12'
+    compile "com.sparkjava:spark-kotlin:1.0.0-alpha"
+    compile "com.sparkjava:spark-template-velocity:2.7.1"
+    compile "org.slf4j:slf4j-simple:1.7.21"
+    compile 'com.h2database:h2:1.4.197'
+    compile 'org.apache.velocity:velocity:1.7'
+    //compile 'org.jetbrains.exposed:exposed:0.10.2'
+    compile 'org.jetbrains.exposed:exposed:0.10.1'
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
\ No newline at end of file
diff --git a/server/src/main/kotlin/com/siapics/server/Database.kt b/server/src/main/kotlin/com/siapics/server/Database.kt
new file mode 100644
index 0000000..9c72e9f
--- /dev/null
+++ b/server/src/main/kotlin/com/siapics/server/Database.kt
@@ -0,0 +1,68 @@
+package com.siapics.server
+
+import org.jetbrains.exposed.sql.*
+import org.jetbrains.exposed.sql.transactions.transaction
+import java.io.File
+import kotlin.streams.asSequence
+
+class Database {
+
+    object Images : Table() {
+        val id: Column<Int> = integer("id").autoIncrement().primaryKey()
+        val externalId: Column<String> = text("externalId")
+        val filename: Column<String?> = text("filename").nullable()
+    }
+
+    // TODO: use a different path (something thats not in the git repo)
+    private val DatabaseFile = File("database").absolutePath
+    private val CreateImageIdLock = Object()
+
+    private val db = org.jetbrains.exposed.sql.Database.connect("jdbc:h2:file:$DatabaseFile", driver = "org.h2.Driver")
+
+    init {
+        transaction(db) {
+            SchemaUtils.createMissingTablesAndColumns(Images)
+        }
+    }
+
+    fun generateRandomImageId(): String {
+        synchronized(CreateImageIdLock) {
+            var randomId = ""
+            while (randomId.isEmpty()) {
+                val characters = "abcdefghijklmnopqrstuvwxyz0123456789"
+                randomId = java.util.Random().ints(6, 0, characters.length)
+                        .asSequence()
+                        .map(characters::get)
+                        .joinToString("")
+                transaction(db) {
+                    SchemaUtils.create(Images)
+                    if (Images.select { Images.externalId.eq(randomId) }.count() > 0) {
+                        randomId = ""
+                    }
+                }
+            }
+
+            transaction(db) {
+                Images.insert {
+                    it[externalId] = randomId
+                    it[filename] = null
+                }
+            }
+            return randomId
+        }
+    }
+
+    fun updateImage(imageId: String, filename: String?) {
+        transaction {
+            Images.update({ Images.externalId.eq(imageId)}) {
+                it[Images.filename] = filename
+            }
+        }
+    }
+
+    fun getImage(imageId: String): ResultRow {
+        return transaction(db) {
+            Images.select { Images.externalId.eq(imageId)}.first()
+        }
+    }
+}
\ No newline at end of file
diff --git a/server/src/main/kotlin/com/siapics/server/Main.kt b/server/src/main/kotlin/com/siapics/server/Main.kt
new file mode 100644
index 0000000..38ad47e
--- /dev/null
+++ b/server/src/main/kotlin/com/siapics/server/Main.kt
@@ -0,0 +1,91 @@
+package com.siapics.server
+
+import io.minio.MinioClient
+import spark.ModelAndView
+import spark.Request
+import spark.Response
+import spark.Spark
+import spark.template.velocity.VelocityTemplateEngine
+import java.io.File
+import java.nio.file.Files
+import javax.servlet.MultipartConfigElement
+
+object Main {
+
+    private val AllowedExtensions = setOf("png", "jpeg", "jpg", "svg", "gif", "bmp")
+
+    // TODO: read keys from env
+    private val minioClient = MinioClient("http://195.201.141.43:9000",
+            "ZVLLMKIJD1ULKOF3KGRG", "pLPB+LfzSFeUt2bKJ4WuYkCLtU8yvSLFe6bTgqp9")
+    private val database = Database()
+
+    @JvmStatic fun main(args: Array<String>) {
+        // Create bucket if it doesn't exist yet.
+        if (!minioClient.bucketExists("siapics")) {
+            minioClient.makeBucket("siapics")
+        }
+
+        Spark.get("/", { request: Request, response: Response ->
+            ModelAndView(mutableMapOf("foo" to "test"), "index.vm")
+        }, VelocityTemplateEngine())
+
+        Spark.post("/", this::uploadFile)
+
+        Spark.get("/view/:id", { request: Request, response: Response ->
+            val image = database.getImage(request.params("id"))
+            ModelAndView(mutableMapOf("filename" to image[Database.Images.filename]), "view.vm")
+        }, VelocityTemplateEngine())
+
+        Spark.get("/image/:id", { request: Request, response: Response ->
+            val inputStream = minioClient.getObject("siapics", request.params("id"))
+            inputStream.copyTo(response.raw().outputStream)
+        })
+    }
+
+    private fun uploadFile(request: Request, response: Response) {
+        if (request.contentLength() > 5 * 1024 * 1024) {
+            Spark.halt("File is too big, maximum 5 MB")
+        }
+
+        val imageId = database.generateRandomImageId()
+        val tempFile = copyUploadToTempFile(imageId, request)
+
+        val filename = getFileName(request)
+        val extension = filename?.split(".")?.last()
+        if (!AllowedExtensions.contains(extension)) {
+            tempFile.delete()
+            Spark.halt("Invalid file type. Supported types are: ${AllowedExtensions.joinToString()}")
+        }
+        database.updateImage(imageId, filename)
+
+        minioClient.putObject("siapics", imageId, tempFile.absolutePath, request.contentType())
+        tempFile.delete()
+        response.redirect("/view/$imageId", 303)
+    }
+
+    private fun copyUploadToTempFile(imageId: String, request: Request): File {
+        val tempFile = Files.createTempFile(null, imageId).toFile()
+        request.attribute("org.eclipse.jetty.multipartConfig", MultipartConfigElement("/tmp"))
+        request.raw().getPart("uploaded_file").inputStream.use { inputStream ->
+            tempFile.outputStream().use { outputStream ->
+                inputStream.copyTo(outputStream)
+            }
+        }
+        return tempFile
+    }
+
+    /**
+     * Reads the original filename of the uploaded file.
+     *
+     * From https://stackoverflow.com/a/30290614
+     */
+    private fun getFileName(request: Request): String? {
+        val part = request.raw().getPart("uploaded_file")
+        for (cd in part.getHeader("content-disposition").split(";")) {
+            if (cd.trim({ it <= ' ' }).startsWith("filename")) {
+                return cd.substring(cd.indexOf('=') + 1).trim({ it <= ' ' }).replace("\"", "")
+            }
+        }
+        return null
+    }
+}
diff --git a/server/src/main/resources/index.vm b/server/src/main/resources/index.vm
new file mode 100644
index 0000000..9e5132e
--- /dev/null
+++ b/server/src/main/resources/index.vm
@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <title>test</title>
+    </head>
+    <body>
+        Hello $foo World!
+        <form method='post' enctype='multipart/form-data'>
+            <input type='file' name='uploaded_file'>
+            <button>Upload picture</button>
+        </form>
+    </body>
+</html>
\ No newline at end of file
diff --git a/server/src/main/resources/view.vm b/server/src/main/resources/view.vm
new file mode 100644
index 0000000..1d9b97d
--- /dev/null
+++ b/server/src/main/resources/view.vm
@@ -0,0 +1,11 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8">
+        <title>test</title>
+    </head>
+    <body>
+        <h2>$filename</h2>
+        <img src="/image/$externalId" \>
+    </body>
+</html>
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..ad1c86c
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,3 @@
+rootProject.name = 'siapics'
+include 'server'
+