upload files to http post request

[Jiten Kothari]

Hi Experts,
I am trying to upload all the files at once through http post request. Previously it passing the document one by one and I need to pass all at once.
this is what I wrote the code so but I am getting error groovy cast exception error which I wrote on comment.
any help will be appreciated.

def upload = {
		def user = session.userName
		def uploadFileCnt = 0
		//def contentURL = grailsApplication.config.content.serverURL
		def contentURL = "http://localhost:13001"
		def postFile
		MultiValueMap<String, Object> variablesMap = new LinkedMultiValueMap<String, Object>();
		
		
		if(request.method == 'POST') {
			
			Iterator itr = request.getFileNames();
			while(itr.hasNext()) {
				MultipartFile file = request.getFile(itr.next());
				
				if (file.empty){
					continue
					}
				
				def fileValidation = {
				
						String origFileType = file.getContentType();
						
						//System.out.println("file type is "+origFileType )
						log.error("file type is "+origFileType )
						
						def acceptContentType = [
													'application/pdf', 															//pdf file
													'application/x-pdf', 														//pdf-2 file
													'application/vnd.openxmlformats-officedocument.wordprocessingml.document',  //docx file
													'application/msword',														//[surl='http://www.aspose.com/categories/java-components/aspose.words-for-java/default.aspx' class='scratch' title='Aspose DOC file manipulation tools']doc file[/surl]
													'application/rtf',															//rtf file
													'image/gif',																//gif file
													'image/jpeg',																//jpeg file
													'image/tiff',																//tiff file
													'image/x-ms-bmp',															//bmp file
													'text/plain'																//txt file
												]
						
						if (!acceptContentType.contains(origFileType))
							return false;
							else
							return true;
				}

				if((!file.empty) && (fileValidation())){
					
					def webRootDir = servletContext.getRealPath("/")
					def userDir = new File(webRootDir, "/documentum/${user}")
					userDir.mkdirs()
					file.transferTo(new File(userDir, file.originalFilename))
					postFile = new File(webRootDir, "/documentum/${user}/${file.originalFilename}")
	

					def fBody = new FileBody(postFile, user)
				
					// debug
					
					def fileType = (file.name).substring(4)
				
					variablesMap.add(fileType, fBody)
					
					uploadFileCnt ++
					
				}
				
			}
			
			//def mpEntity = new MultipartEntity()
			//mpEntity.addPart(variablesMap)
			
			def http = new HTTPBuilder(contentURL)
			
			http.request(POST) { req ->
						
				uri.path = '/bps/http/SubmitEmergencyPlanDocuments'
				uri.query = [UserName: user]
				
				req = variablesMap //getting error on this line
				
			}
			postFile.delete()
		
		if (uploadFileCnt == 0) {
		  flash.message = "${uploadFileCnt} documents uploaded. NOTE: You must submit annex in the PDF, DOC, or DOCX format. All other file formats are rejected."
	  } else {
		flash.message = "Successfully Uploaded ${uploadFileCnt} documents."
		}
		redirect(action: "documents", email: user)
	}
	}

[Gregg Bolinger]

You didn't tell us what isn't working but you're making this way to hard on yourself. Check out this blog:

http://blog.robert.freudenreich.eu/grails-handling-multi-file-parameters

[Jiten Kothari]

I got the solution to the problem. I wanted to add more then one file to multi part entity and then submit group of files at same time to http post request.
Thanks for the help


here is the solution code

def upload = {
		def user = session.userName
		def uploadFileCnt = 0
		def contentURL = grailsApplication.config.content.serverURL
		//def contentURL = "http://localhost:13001"
		
		def postFile
		def mpEntity = new MultipartEntity()
		def userDir
		
		if(request.method == 'POST') {
			
			Iterator itr = request.getFileNames();
			while(itr.hasNext()) {
				MultipartFile file = request.getFile(itr.next());
				
				if (file.empty){
					continue
					}
				
				def fileValidation = {
				
						String origFileType = file.getContentType();
						
						//System.out.println("file type is "+origFileType )
						log.error("file type is "+origFileType )
						
						def acceptContentType = [
													'application/pdf', 															//pdf file
													'application/x-pdf', 														//pdf-2 file
													'application/vnd.openxmlformats-officedocument.wordprocessingml.document',  //docx file
													'application/msword',														//doc file
													'application/rtf',															//rtf file
													'image/gif',																//gif file
													'image/jpeg',																//jpeg file
													'image/tiff',																//tiff file
													'image/x-ms-bmp',															//bmp file
													'text/plain'																//txt file
												]
						
						if (!acceptContentType.contains(origFileType))
							return false;
							else
							return true;
				}

				if((!file.empty) && (fileValidation())){
					
					def webRootDir = servletContext.getRealPath("/")
					userDir = new File(webRootDir, "/documentum/${user}")
					userDir.mkdirs()
					file.transferTo(new File(userDir, file.originalFilename))
					postFile = new File(webRootDir, "/documentum/${user}/${file.originalFilename}")

					def fBody = new FileBody(postFile, user)
				
					def fileType = (file.name).substring(4)
				
					mpEntity.addPart(fileType, fBody)
				
					uploadFileCnt ++
					
				}
			}
			
			def http = new HTTPBuilder(contentURL)
			
			http.request(POST) { req ->
						
				uri.path = '/bps/http/SubmitEmergencyPlanDocuments'
				uri.query = [UserName: user]
				
				req.entity = mpEntity
				
			}
			
			userDir.eachFile{
				if  (it.isFile()){
					it.delete()          // it deletes all the files inside ${user} directory --> /documentum/${user}/${file.originalFilename}
					}
				}
			
			
		if (uploadFileCnt == 0) {
		  flash.message = "${uploadFileCnt} documents uploaded. NOTE: You must submit annex in the PDF, DOC, or DOCX format. All other file formats are rejected."
	  } else {
		flash.message = "Successfully Uploaded ${uploadFileCnt} documents."
		}
		redirect(action: "documents", email: user)
	}
}