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Diffstat (limited to 'common/package.go')
-rw-r--r-- | common/package.go | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/common/package.go b/common/package.go deleted file mode 100644 index 4e8780c08..000000000 --- a/common/package.go +++ /dev/null @@ -1,139 +0,0 @@ -// Copyright 2014 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// it under the terms of the GNU Lesser General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// The go-ethereum library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Lesser General Public License for more details. -// -// You should have received a copy of the GNU Lesser General Public License -// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. - -package common - -import ( - "archive/zip" - "encoding/json" - "fmt" - "io" - "io/ioutil" - "strings" -) - -// Manifest object -// -// The manifest object holds all the relevant information supplied with the -// the manifest specified in the package -type Manifest struct { - Entry string - Height, Width int -} - -// External package -// -// External package contains the main html file and manifest -type ExtPackage struct { - EntryHtml string - Manifest *Manifest -} - -// Read file -// -// Read a given compressed file and returns the read bytes. -// Returns an error otherwise -func ReadFile(f *zip.File) ([]byte, error) { - rc, err := f.Open() - if err != nil { - return nil, err - } - defer rc.Close() - - content, err := ioutil.ReadAll(rc) - if err != nil { - return nil, err - } - - return content, nil -} - -// Reads manifest -// -// Reads and returns a manifest object. Returns error otherwise -func ReadManifest(m []byte) (*Manifest, error) { - var manifest Manifest - - dec := json.NewDecoder(strings.NewReader(string(m))) - if err := dec.Decode(&manifest); err == io.EOF { - } else if err != nil { - return nil, err - } - - return &manifest, nil -} - -// Find file in archive -// -// Returns the index of the given file name if it exists. -1 if file not found -func FindFileInArchive(fn string, files []*zip.File) (index int) { - index = -1 - // Find the manifest first - for i, f := range files { - if f.Name == fn { - index = i - } - } - - return -} - -// Open package -// -// Opens a prepared ethereum package -// Reads the manifest file and determines file contents and returns and -// the external package. -func OpenPackage(fn string) (*ExtPackage, error) { - r, err := zip.OpenReader(fn) - if err != nil { - return nil, err - } - defer r.Close() - - manifestIndex := FindFileInArchive("manifest.json", r.File) - - if manifestIndex < 0 { - return nil, fmt.Errorf("No manifest file found in archive") - } - - f, err := ReadFile(r.File[manifestIndex]) - if err != nil { - return nil, err - } - - manifest, err := ReadManifest(f) - if err != nil { - return nil, err - } - - if manifest.Entry == "" { - return nil, fmt.Errorf("Entry file specified but appears to be empty: %s", manifest.Entry) - } - - entryIndex := FindFileInArchive(manifest.Entry, r.File) - if entryIndex < 0 { - return nil, fmt.Errorf("Entry file not found: '%s'", manifest.Entry) - } - - f, err = ReadFile(r.File[entryIndex]) - if err != nil { - return nil, err - } - - extPackage := &ExtPackage{string(f), manifest} - - return extPackage, nil -} |