I want to upload a file from an html form using spark. Following is my java function to handle the post route:
Spark.post("/upload", "multipart/form-data", (request, response) -> {
String location = "temporary"; // the directory location where files will be stored
long maxFileSize = 100000000; // the maximum size allowed for uploaded files
long maxRequestSize = 100000000; // the maximum size allowed for multipart/form-data requests
int fileSizeThreshold = 1024; // the size threshold after which files will be written to disk
MultipartConfigElement multipartConfigElement = new MultipartConfigElement(
location, maxFileSize, maxRequestSize, fileSizeThreshold);
request.raw().setAttribute("org.eclipse.multipartConfig",
multipartConfigElement);
Collection<Part> parts = request.raw().getParts(); //Line 50 where error is there
for (Part part : parts) {
System.out.println("Name: " + part.getName());
System.out.println("Size: " + part.getSize());
System.out.println("Filename: " + part.getSubmittedFileName());
}
String fName = request.raw().getPart("xmlfile").getSubmittedFileName();
System.out.println("Title: " + request.raw().getParameter("title"));
System.out.println("File: " + fName);
Part uploadedFile = request.raw().getPart("xmlFile");
Path out = Paths.get("temporary/" + fName);
try (final InputStream in = uploadedFile.getInputStream()) {
Files.copy(in, out);
uploadedFile.delete();
}
// cleanup
multipartConfigElement = null;
//parts = null;
uploadedFile = null;
return "OK";
});
Following is the HTML form :
<form class="ui fluid action input" id="fileForm" method="post" action="/sparkapp/upload" enctype = "multipart/form-data">
<input type="text" name="filePath" readonly>
<input type="file" name="xmlFile">
<button type="submit" value="Submit">
</form>
When I'm uploading a file, I'm getting 500: Internal server error with the following stack trace:
java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided
at org.apache.catalina.connector.Request.parseParts(Request.java:2734)
at org.apache.catalina.connector.Request.getParts(Request.java:2701)
at org.apache.catalina.connector.Request.getPart(Request.java:2885)
at org.apache.catalina.connector.RequestFacade.getPart(RequestFacade.java:1089)
at javax.servlet.http.HttpServletRequestWrapper.getPart(HttpServletRequestWrapper.java:362)
at com.amulya.Application$2.handle(Application.java:50)
at spark.RouteImpl$1.handle(RouteImpl.java:61)
at spark.http.matching.Routes.execute(Routes.java:61)
at spark.http.matching.MatcherFilter.doFilter(MatcherFilter.java:127)
at spark.servlet.SparkFilter.doFilter(SparkFilter.java:173)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Followed the following question but the answer didn't work: SparkJava: Upload file did't work in Spark java framework
I'm using eclipse IDE and tomcat server.
Please help me with this problem.
You also have to provide multipart config settings in your Servlet configuration inside the web.xml file. I have listed an example below:
I just found out that as I'm using tomcat server with spark, I had set up filter i.e.
spark.servlet.SparkFilter
.Through this answer I found out that actually, I needed to set
allowCasualMultipartParsing="true"
in the webapp's
<Context>
element inWebapp/META-INF/context.xml
orTomcat/conf/server.xml
so that Tomcat should automatically parsemultipart/form-data
request bodies whenHttpServletRequest.getPart*
orHttpServletRequest.getParameter*
is called, even when the target servlet isn't marked with the@MultipartConfig
annotation.Please see the following links for reference:
http://sparkjava.com/documentation.html#other-webserver
https://stackoverflow.com/a/8050589/2256258
http://tomcat.apache.org/tomcat-7.0-doc/config/context.html
https://examples.javacodegeeks.com/enterprise-java/tomcat/tomcat-context-xml-configuration-example/