github.com/cxptek/go-ethereum@v1.9.7/internal/build/azure.go (about)

     1  // Copyright 2016 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package build
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"net/url"
    23  	"os"
    24  
    25  	"github.com/Azure/azure-storage-blob-go/azblob"
    26  )
    27  
    28  // AzureBlobstoreConfig is an authentication and configuration struct containing
    29  // the data needed by the Azure SDK to interact with a speicifc container in the
    30  // blobstore.
    31  type AzureBlobstoreConfig struct {
    32  	Account   string // Account name to authorize API requests with
    33  	Token     string // Access token for the above account
    34  	Container string // Blob container to upload files into
    35  }
    36  
    37  // AzureBlobstoreUpload uploads a local file to the Azure Blob Storage. Note, this
    38  // method assumes a max file size of 64MB (Azure limitation). Larger files will
    39  // need a multi API call approach implemented.
    40  //
    41  // See: https://msdn.microsoft.com/en-us/library/azure/dd179451.aspx#Anchor_3
    42  func AzureBlobstoreUpload(path string, name string, config AzureBlobstoreConfig) error {
    43  	if *DryRunFlag {
    44  		fmt.Printf("would upload %q to %s/%s/%s\n", path, config.Account, config.Container, name)
    45  		return nil
    46  	}
    47  	// Create an authenticated client against the Azure cloud
    48  	credential, err := azblob.NewSharedKeyCredential(config.Account, config.Token)
    49  	if err != nil {
    50  		return err
    51  	}
    52  
    53  	pipeline := azblob.NewPipeline(credential, azblob.PipelineOptions{})
    54  
    55  	u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", config.Account))
    56  	service := azblob.NewServiceURL(*u, pipeline)
    57  
    58  	container := service.NewContainerURL(config.Container)
    59  	blockblob := container.NewBlockBlobURL(name)
    60  
    61  	// Stream the file to upload into the designated blobstore container
    62  	in, err := os.Open(path)
    63  	if err != nil {
    64  		return err
    65  	}
    66  	defer in.Close()
    67  
    68  	_, err = blockblob.Upload(context.Background(), in, azblob.BlobHTTPHeaders{}, azblob.Metadata{}, azblob.BlobAccessConditions{})
    69  	return err
    70  }
    71  
    72  // AzureBlobstoreList lists all the files contained within an azure blobstore.
    73  func AzureBlobstoreList(config AzureBlobstoreConfig) ([]azblob.BlobItem, error) {
    74  	credential, err := azblob.NewSharedKeyCredential(config.Account, config.Token)
    75  	if err != nil {
    76  		return nil, err
    77  	}
    78  
    79  	pipeline := azblob.NewPipeline(credential, azblob.PipelineOptions{})
    80  
    81  	u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", config.Account))
    82  	service := azblob.NewServiceURL(*u, pipeline)
    83  
    84  	// List all the blobs from the container and return them
    85  	container := service.NewContainerURL(config.Container)
    86  
    87  	res, err := container.ListBlobsFlatSegment(context.Background(), azblob.Marker{}, azblob.ListBlobsSegmentOptions{
    88  		MaxResults: 1024 * 1024 * 1024, // Yes, fetch all of them
    89  	})
    90  	if err != nil {
    91  		return nil, err
    92  	}
    93  	return res.Segment.BlobItems, nil
    94  }
    95  
    96  // AzureBlobstoreDelete iterates over a list of files to delete and removes them
    97  // from the blobstore.
    98  func AzureBlobstoreDelete(config AzureBlobstoreConfig, blobs []azblob.BlobItem) error {
    99  	if *DryRunFlag {
   100  		for _, blob := range blobs {
   101  			fmt.Printf("would delete %s (%s) from %s/%s\n", blob.Name, blob.Properties.LastModified, config.Account, config.Container)
   102  		}
   103  		return nil
   104  	}
   105  	// Create an authenticated client against the Azure cloud
   106  	credential, err := azblob.NewSharedKeyCredential(config.Account, config.Token)
   107  	if err != nil {
   108  		return err
   109  	}
   110  
   111  	pipeline := azblob.NewPipeline(credential, azblob.PipelineOptions{})
   112  
   113  	u, _ := url.Parse(fmt.Sprintf("https://%s.blob.core.windows.net", config.Account))
   114  	service := azblob.NewServiceURL(*u, pipeline)
   115  
   116  	container := service.NewContainerURL(config.Container)
   117  
   118  	// Iterate over the blobs and delete them
   119  	for _, blob := range blobs {
   120  		blockblob := container.NewBlockBlobURL(blob.Name)
   121  		if _, err := blockblob.Delete(context.Background(), azblob.DeleteSnapshotsOptionInclude, azblob.BlobAccessConditions{}); err != nil {
   122  			return err
   123  		}
   124  	}
   125  	return nil
   126  }