I am using Apache camel FTP and AWS module (v2.18 ) to create a route
between SFTP and AWS S3. Connection to SFTP location is established via ssh
jump-host.
Able to connect via Unix command :
sftp -o UserKnownHostsFile=/dev/null
-o StrictHostKeyChecking=no
-i /path/to/host/private-key-file
-o 'ProxyCommand=ssh
-o UserKnownHostsFile=/dev/null
-o StrictHostKeyChecking=no
-i /path/to/jumphost/private-key-file
-l jumphostuser jump.host.com nc sftp.host.com 22'
sftp-u...@sftp.host.com
However I am getting error while connecting using Apache camel :
Cannot connect/login to: sftp://sftp-u...@sftp.host.com:22
For testing purposes I tried connecting to SFTP using Spring -Integration
and I was able to do it successfully using the same proxy implementation
(JumpHostProxyCommand) mentioned below.
Below is the Spring boot + Apache Camel code that I have been using:
Jsch proxy :
import com.jcraft.jsch.*;
class JumpHostProxyCommand implements Proxy {
String command;
Process p = null;
InputStream in = null;
OutputStream out = null;
public JumpHostProxyCommand(String command) {
this.command = command;
}
public void connect(SocketFactory socket_factory, String
host, int port, int timeout) throws Exception {
String cmd = command.replace("%h", host);
cmd = cmd.replace("%p", new Integer(port).toString());
p = Runtime.getRuntime().exec(cmd);
log.debug("Process returned by proxy command {} , {}",
command, p);
in = p.getInputStream();
log.debug("Input stream returned by proxy {}", in);
out = p.getOutputStream();
log.debug("Output stream returned by proxy {}", out);
}
public Socket getSocket() {
return null;
}
public InputStream getInputStream() {
return in;
}
public OutputStream getOutputStream() {
return out;
}
public void close() {
try {
if (p != null) {
p.getErrorStream().close();
p.getOutputStream().close();
p.getInputStream().close();
p.destroy();
p = null;
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
Spring boot camel Configuration :
@Configuration
public class CamelConfig {
@Autowired
DataSource dataSource;
@Bean(name = "jdbcMsgIdRepo")
public JdbcMessageIdRepository JdbcMessageIdRepository() {
return new JdbcMessageIdRepository(dataSource,"jdbc-repo");
}
@Bean(name = "s3Client")
public AmazonS3 s3Client() {
return new AmazonS3Client();
}
@Bean(name="jumpHostProxyCommand")
JumpHostProxyCommand jumpHostProxyCommand()
{
String proxykeyFilePath = "/path/to/jumphost/private-key-file";
String command = "ssh -o UserKnownHostsFile=/dev/null -o
StrictHostKeyChecking=no -i /proxy/host/key/path -l jumphostuser
jump.host.com nc %h %p";
log.debug("JumpHostProxyCommand : " + command);
return new JumpHostProxyCommand(command);
}
}
build.gradle file:
task wrapper(type: Wrapper) {
gradleVersion = '2.5'
}
ext {
springBootVersion = "1.4.1.RELEASE"
awsJavaSdkVersion = "1.10.36"
postgresVersion = "11.2.0.3.0"
jacksonVersion = "2.8.4"
sl4jVersion = "1.7.21"
junitVersion = "4.12"
camelVersion ="2.18.0"
}
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.4.1.RELEASE")
}
}
repositories {
mavenCentral()
}
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'spring-boot'
sourceCompatibility = 1.8
targetCompatibility = 1.8
springBoot {
executable = true
}
dependencies {
//logging
compile("ch.qos.logback:logback-classic:1.1.3")
compile("ch.qos.logback:logback-core:1.1.3")
compile("org.slf4j:slf4j-api:$sl4jVersion")
//Spring boot
compile("org.springframework.boot:spring-boot-starter-web:$springBootVersion")
compile("org.springframework.boot:spring-boot-starter-jdbc:$springBootVersion")
compile("org.apache.camel:camel-spring-boot-starter:$camelVersion")
//Jdbc
compile("postgresql:postgresql:9.0-801.jdbc4")
//Camel
compile("org.apache.camel:camel-ftp:$camelVersion")
compile("org.apache.camel:camel-aws:$camelVersion")
compile("org.apache.camel:camel-core:$camelVersion")
compile("org.apache.camel:camel-spring-boot:$camelVersion")
compile("org.apache.camel:camel-sql:$camelVersion")
//Aws sdk
compile("com.amazonaws:aws-java-sdk:$awsJavaSdkVersion")
//Json
compile("com.fasterxml.jackson.core:jackson-core:$jacksonVersion")
compile("com.fasterxml.jackson.core:jackson-annotations:$jacksonVersion")
compile("com.fasterxml.jackson.core:jackson-databind:$jacksonVersion")
compile("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jacksonVersion")
//Swagger
compile("io.springfox:springfox-swagger2:2.0.2")
compile("io.springfox:springfox-swagger-ui:2.0.2")
//utilities
compile('org.projectlombok:lombok:1.16.6')
compile("org.apache.commons:commons-collections4:4.1")
compile("org.apache.commons:commons-lang3:3.4")
//Junit
testCompile("junit:junit:$junitVersion")
testCompile("org.springframework.boot:spring-boot-starter-test:$springBootVersion")
testCompile("org.mockito:mockito-all:1.10.19")
}
I have been struggling for last 2 days to find out the root cause of the
error, any help on this issue is really appreciated. Thanks!
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