text: Salesforce extract files within Blob Zip File
  salesforce apex zip
  I am developing an application in
  Salesforce Where i get a
  zip file form an external server using
  HttpRequest.
  The file i get from the server is
  Blob, but i don't know how to process it to extract the files i want.
  Here's the code
  HttpRequest req = new HttpRequest(); /* Here i set the HttpRequest Attributes*/ Http http = new Http(); HttpResponse response = http.send(req); Blob file = response.getBodyAsBlob(); /*Now i need to access: file to extract the files i want*/
  This can be done with the Zippex library. It's open source and available here:
  HttpRequest request = new HttpRequest(); /* Here set the HttpRequest Attributes */ Http http = new Http(); HttpResponse response = http.send(request); Blob file = response.getBodyAsBlob(); //Instantiate Zippex with zip file Blob Zippex zip = Zippex(file); for (String fileName : zip.getFileNames()) { //Extract file Blob fileData = zip.getFile(fileName); //Process the file here ... }
  How to process a HttpResponse blob zip file, In my application, i am sending an HttpRequest to an external server to .com/questions/31993430/salesforce-extract-files-within-blob-zip-file This will only run in a Visualforce or browser context (e.g. SControl, custom buttons), but it would allow you to read the ZIP file, which you can then read using jQuery's (or any other library/script) methods to parse and navigate the contained XML file.
  Salesforce doesn't support zip file extraction. You will have to do it at your externally hosted service.
  How to unzip a zipfile attachment in apex and process each file in , Blob zipBlob; //This needs to contain the zip file Zippex myZip = new Zippex(zipBlob); //Loop through the files in Zip and process them for (String fileName The file is taken as input from user(as blob) and then encoded into base 64. This base encoding makes the string size grater than 3MB. As the mazimum size of String allowed is 3MB, i am unable to upload zip files greater than 3 MB.<br>Also, even if i do upload the file without using salesforce, i need to read the zip file after uploading it.
  I have finally found a solution, it's not the best one, because to unzip the file i should use an external service, but i am running out of time, so these are the steps i followed:
  1. Create StaticResource for the zip file (i had to use the
  Metadata Salesforce Api)
  2. extract the file you want by creating a PageReference object with url: `/resource/NameOfResource/NameOfFile
  3. delete the StaticResource: i created it only to extract some files, so i don't need it any more.
  Here's a sample code of the first point that i get from This link
  private static MetadataService.MetadataPort createService() { MetadataService.MetadataPort service = new MetadataService.MetadataPort(); service.SessionHeader = new MetadataService.SessionHeader_element(); service.SessionHeader.sessionId = UserInfo.getSessionId(); return service; } MetadataService.MetadataPort service = createService(); MetadataService.StaticResource staticResource = new MetadataService.StaticResource(); staticResource.fullName = nameOfResource; staticResource.contentType = 'application/zip'; staticResource.cacheControl = 'public'; staticResource.content = EncodingUtil.base64Encode(zipBlobFile); List<MetadataService.SaveResult> results = service.createMetadata( new MetadataService.Metadata[] { staticResource });
  and here's the code for the second point that i get from the same link
  private static String GetResourceURL(String resourceName){ // Fetching the resource List<StaticResource> resourceList= [SELECT Name, NamespacePrefix, SystemModStamp FROM StaticResource WHERE Name = :resourceName]; // Checking if the result is returned or not if(resourceList.size() == 1){ // Getting namespace String namespace = resourceList[0].NamespacePrefix; // Resource URL return '/resource/' + resourceList[0].SystemModStamp.getTime() + '/' + (namespace != null && namespace != '' ? namespace + '__' : '') + resourceName; } else return ''; } private Blob getResourceFile(String url, String fileName) { PageReference tmp = new PageReference(url + '/' + fileName); Blob contentAsBlob = tmp.getContent(); return contentAsBlob; } String url = GetResourceURL(nameOfResource); Blob myFile = getResourceFile(url, nameOfFileToExtract);
  For the tird point it's just one line of code :
  List<MetadataService.DeleteResult> deleteResults = service.deleteMetadata('StaticResource', new String[] { resourceName });
  I hope this answer will be usefull.
  EDIT:
  If you have to create the
  StaticResource and then delete it, don't execute
  DML operations between the create and delete
  callouts, instead of that execute the
  DML operation after or before the
  Callout, unless you want to execute the
  callout in a
  @future method but it didn't work for me.
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  - i read an article about Zippex Library a few weeks ago, and it seems to be the best solution. Thanks
  - You could improve your answer by generally suggesting implementations of external services.
  - Do you have any suggestions ? I didn't find a solution yet
  - You may want to try the Expand Container API from HPE Haven OnDemand... dev.havenondemand.com/apis/expandcontainer#overview (Disclosure: I work for Hewlett Packard Enterprise)