Examples of javax.servlet.http.Part

javax.servlet.http.Part

    public Part getPart(String name) throws IOException, IllegalStateException,
            ServletException {
        Collection<Part> c = getParts();
        Iterator<Part> iterator = c.iterator();
        while (iterator.hasNext()) {
            Part part = iterator.next();
            if (name.equals(part.getName())) {
                return part;
            }
        }
        return null;
    }

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    public Part getPart(String name) throws IOException, IllegalStateException,
            ServletException {
        Collection<Part> c = getParts();
        Iterator<Part> iterator = c.iterator();
        while (iterator.hasNext()) {
            Part part = iterator.next();
            if (name.equals(part.getName())) {
                return part;
            }
        }
        return null;
    }

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    public Part getPart(String name) throws IOException, IllegalStateException,
            ServletException {
        Collection<Part> c = getParts();
        Iterator<Part> iterator = c.iterator();
        while (iterator.hasNext()) {
            Part part = iterator.next();
            if (name.equals(part.getName())) {
                return part;
            }
        }
        return null;
    }

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            @Override
            public boolean check(HttpServletRequest request,HttpServletResponse response)
            {
                try
                {
                    Part foo = request.getPart("stuff");
                    return false;
                }
                catch (IllegalStateException e)
                {
                    //expected exception because no multipart config is set up

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                request.setAttribute(Request.__MULTIPART_CONFIG_ELEMENT, mpce);


                String field1 = request.getParameter("field1");
                assertNotNull(field1);


                Part foo = request.getPart("stuff");
                assertNotNull(foo);
                assertTrue(foo.getSize() > 0);
                response.setStatus(200);
            }
            catch (IllegalStateException e)
            {
                //expected exception because no multipart config is set up

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        }


        String targetFolder = slurpUtf8Part(request, response, "targetFolder", 1024);
        if (targetFolder == null) return;


        Part filePart = request.getPart("file");
        if (filePart == null) {
            response.sendError(400, "Field \"file\" is missing.");
            return;
        }
        String fileName = filePart.getName();
        if (fileName == null) {
            response.sendError(400, "Field \"file\" has no name.");
            return;
        }


        // Upload file to Dropbox
        String fullTargetPath = targetFolder + "/" + fileName;
        DbxEntry.File metadata;
        try {
            metadata = dbxClient.uploadFile(fullTargetPath, DbxWriteMode.add(), filePart.getSize(), filePart.getInputStream());
        }
        catch (DbxException ex) {
            common.handleDbxException(response, user, ex, "uploadFile(" + jq(fullTargetPath) + ", ...)");
            return;
        }

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     * Otherwise, process it as UTF-8 bytes and return the equivalent String.
     */
    private static String slurpUtf8Part(HttpServletRequest request, HttpServletResponse response, String name, int maxLength)
            throws IOException, ServletException
    {
        Part part = request.getPart(name);
        if (part == null) {
            response.sendError(400, "Form field " + jq(name) + " is missing");
            return null;
        }


        byte[] bytes = new byte[maxLength];
        InputStream in = part.getInputStream();
        int bytesRead = in.read(bytes);
        String s = new String(bytes, 0, bytesRead, UTF8);
        if (in.read() != -1) {
            response.sendError(400, "Field " + jq(name) + " is too long (the limit is " + maxLength + " bytes): " + jq(s));
            return null;

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            if (parts != null)
            {
                Iterator<Part> itor = parts.iterator();
                while (itor.hasNext() && params.size() < _maxFormKeys)
                {
                    Part p = itor.next();
                    MultiPartInputStreamParser.MultiPart mp = (MultiPartInputStreamParser.MultiPart)p;
                    if (mp.getFile() != null)
                    {
                        request.setAttribute(mp.getName(),mp.getFile());
                        if (mp.getContentDispositionFilename() != null)
                        {
                            params.add(mp.getName(), mp.getContentDispositionFilename());
                            if (mp.getContentType() != null)
                                params.add(mp.getName()+CONTENT_TYPE_SUFFIX, mp.getContentType());
                        }
                    }
                    else
                    {
                        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
                        IO.copy(p.getInputStream(), bytes);
                        params.add(p.getName(), bytes.toByteArray());
                        if (p.getContentType() != null)
                            params.add(p.getName()+CONTENT_TYPE_SUFFIX, p.getContentType());
                    }
                }
            }


            // handle request

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        mpis.setDeleteOnExit(true);
        Collection<Part> parts = mpis.getParts();
        assertThat(parts.size(), is(4));
        
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        Part fileName = mpis.getPart("fileName");
        assertThat(fileName, notNullValue());
        assertThat(fileName.getSize(), is(3L));
        IO.copy(fileName.getInputStream(), baos);
        assertThat(baos.toString("US-ASCII"), is("abc"));
       
        baos = new ByteArrayOutputStream();
        Part desc = mpis.getPart("desc");
        assertThat(desc, notNullValue());
        assertThat(desc.getSize(), is(3L));
        IO.copy(desc.getInputStream(), baos);
        assertThat(baos.toString("US-ASCII"), is("123"));
        
        baos = new ByteArrayOutputStream();
        Part title = mpis.getPart("title");
        assertThat(title, notNullValue());
        assertThat(title.getSize(), is(3L));
        IO.copy(title.getInputStream(), baos);
        assertThat(baos.toString("US-ASCII"), is("ttt"));  
    }

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        mpis.setDeleteOnExit(true);


        Collection<Part> parts =    mpis.getParts();
        assertThat(parts, notNullValue());
        assertThat(parts.size(), is(2));
        Part field1 = mpis.getPart("field1");
        assertThat(field1, notNullValue());
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        IO.copy(field1.getInputStream(), baos);
        assertThat(baos.toString("US-ASCII"), is("Joe Blow"));
        
        Part stuff = mpis.getPart("stuff");
        assertThat(stuff, notNullValue());
        baos = new ByteArrayOutputStream();
        IO.copy(stuff.getInputStream(), baos);
        assertTrue(baos.toString("US-ASCII").contains("aaaa"));
    }

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