Examples with Hasher com.google.common.hash.Hasher used on opensource projects

Example 51 with Hasher

use of com.google.common.hash.Hasher in project guava by google.

the class ByteSource method hash.

/**
   * Hashes the contents of this byte source using the given hash function.
   *
   * @throws IOException if an I/O error occurs while reading from this source
   */
public HashCode hash(HashFunction hashFunction) throws IOException {
    Hasher hasher = hashFunction.newHasher();
    copyTo(Funnels.asOutputStream(hasher));
    return hasher.hash();
}

Example 52 with Hasher

use of com.google.common.hash.Hasher in project beam by apache.

the class PackageUtil method createPackageAttributes.

/**
   * Compute and cache the attributes of a classpath element that we will need to stage it.
   *
   * @param source the file or directory to be staged.
   * @param stagingPath The base location for staged classpath elements.
   * @param overridePackageName If non-null, use the given value as the package name
   *                            instead of generating one automatically.
   * @return a {@link PackageAttributes} that containing metadata about the object to be staged.
   */
static PackageAttributes createPackageAttributes(File source, String stagingPath, @Nullable String overridePackageName) {
    boolean directory = source.isDirectory();
    // Compute size and hash in one pass over file or directory.
    Hasher hasher = Hashing.md5().newHasher();
    OutputStream hashStream = Funnels.asOutputStream(hasher);
    try (CountingOutputStream countingOutputStream = new CountingOutputStream(hashStream)) {
        if (!directory) {
            // Files are staged as-is.
            Files.asByteSource(source).copyTo(countingOutputStream);
        } else {
            // Directories are recursively zipped.
            ZipFiles.zipDirectory(source, countingOutputStream);
        }
        countingOutputStream.flush();
        long size = countingOutputStream.getCount();
        String hash = Base64Variants.MODIFIED_FOR_URL.encode(hasher.hash().asBytes());
        // Create the DataflowPackage with staging name and location.
        String uniqueName = getUniqueContentName(source, hash);
        String resourcePath = FileSystems.matchNewResource(stagingPath, true).resolve(uniqueName, StandardResolveOptions.RESOLVE_FILE).toString();
        DataflowPackage target = new DataflowPackage();
        target.setName(overridePackageName != null ? overridePackageName : uniqueName);
        target.setLocation(resourcePath);
        return new PackageAttributes(size, hash, directory, target, source.getPath());
    } catch (IOException e) {
        throw new RuntimeException("Package setup failure for " + source, e);
    }
}

Example 53 with Hasher

use of com.google.common.hash.Hasher in project gerrit by GerritCodeReview.

the class LibraryDownloader method verifyFileChecksum.

private void verifyFileChecksum() {
    if (sha1 == null) {
        System.err.println();
        System.err.flush();
        return;
    }
    Hasher h = Hashing.sha1().newHasher();
    try (InputStream in = Files.newInputStream(dst);
        OutputStream out = Funnels.asOutputStream(h)) {
        ByteStreams.copy(in, out);
    } catch (IOException e) {
        deleteDst();
        throw new Die("cannot checksum " + dst, e);
    }
    if (sha1.equals(h.hash().toString())) {
        System.err.println("Checksum " + dst.getFileName() + " OK");
        System.err.flush();
    } else if (ui.isBatch()) {
        deleteDst();
        throw new Die(dst + " SHA-1 checksum does not match");
    } else if (!ui.yesno(null, //
    "error: SHA-1 checksum does not match\nUse %s anyway", dst.getFileName())) {
        deleteDst();
        throw new Die("aborted by user");
    }
}

Example 54 with Hasher

use of com.google.common.hash.Hasher in project gitiles by GerritCodeReview.

the class Renderer method computeTemplateHash.

HashCode computeTemplateHash(String soyFile) {
    URL u = templates.get(soyFile);
    checkState(u != null, "Missing Soy template %s", soyFile);
    Hasher h = Hashing.sha1().newHasher();
    try (InputStream is = u.openStream();
        OutputStream os = Funnels.asOutputStream(h)) {
        ByteStreams.copy(is, os);
    } catch (IOException e) {
        throw new IllegalStateException("Missing Soy template " + soyFile, e);
    }
    return h.hash();
}

Example 55 with Hasher

use of com.google.common.hash.Hasher in project gerrit by GerritCodeReview.

the class GetRevisionActions method getETag.

@Override
public String getETag(RevisionResource rsrc) {
    Hasher h = Hashing.md5().newHasher();
    CurrentUser user = rsrc.getControl().getUser();
    try {
        rsrc.getChangeResource().prepareETag(h, user);
        h.putBoolean(Submit.wholeTopicEnabled(config));
        ReviewDb db = dbProvider.get();
        ChangeSet cs = mergeSuperSet.get().completeChangeSet(db, rsrc.getChange(), user);
        for (ChangeData cd : cs.changes()) {
            changeResourceFactory.create(cd.changeControl()).prepareETag(h, user);
        }
        h.putBoolean(cs.furtherHiddenChanges());
    } catch (IOException | OrmException e) {
        throw new OrmRuntimeException(e);
    }
    return h.hash().toString();
}