docker 部署ipfs节点并使用nodejs进行上传测试

docker 部署ipfs节点

# 创建docker ipfs 映射目录
% mkidr -p /Users/domino/files/ipfs/ipfs_node/ipfs_data
% mkdir -p /Users/domino/files/ipfs/ipfs_node/ipfs_staging

# 创建临时变量
% export ipfs_staging=/Users/jiangwujie/files/ipfs/ipfs_node/ipfs_staging
% export ipfs_data=/Users/jiangwujie/files/ipfs/ipfs_node/ipfs_data

# docker 启动 ipfs节点
% docker run -d --name ipfs_host -v $ipfs_staging:/export -v $ipfs_data:/data/ipfs -p 4001:4001 -p 8080:8080 -p 5001:5001 ipfs/go-ipfs:latest
# 查看ipfs容器
% docker ps
CONTAINER ID   IMAGE                                       COMMAND                  CREATED          STATUS                    PORTS                                                                                        NAMES
24b518cb8ad9   ipfs/go-ipfs:latest                         "/sbin/tini -- /usr/…"   35 minutes ago   Up 35 minutes (healthy)   0.0.0.0:4001->4001/tcp, 0.0.0.0:5001->5001/tcp, 4001/udp, 0.0.0.0:8080->8080/tcp, 8081/tcp   ipfs_host

使用nodejs进行本地图片上传测试

const ipfsAPI = require('ipfs-api');

// create an instance of the ipfs api client with the address of the local node
const ipfs = ipfsAPI('localhost', '5001', {protocol: 'http'});

// read the image file from disk
const fs = require('fs');
const file = fs.readFileSync('/Users/domino/Downloads/jiagoutu.png');

// add the file to IPFS
ipfs.add(file, (err, result) => {
    if (err) {
        console.error(err);
        return;
    }

    console.log('Image uploaded to IPFS. IPFS hash:', result[0].hash);
});

执行测试，可以看到上传成功

% node src/testipfs.js 
{
  'api-path': '/api/v0/',
  'user-agent': '/node-ipfs-api/26.1.2/',
  host: 'localhost',
  port: '5001',
  protocol: 'http'
}
Image uploaded to IPFS. IPFS hash: QmRXxBUN7rpGKRrE8sVxA5vzUd9JQTi4kDu2Nc4WctqaHX

使用这个hash值在浏览器上可以正常的获取图片进行展示

url为：http://localhost:8080/ipfs/{hash值}
如：http://localhost:8080/ipfs/QmRXxBUN7rpGKRrE8sVxA5vzUd9JQTi4kDu2Nc4WctqaHX

其他cors需要注意

如果在其他域名下使用js访问本地ipfs节点出现浏览器跨域的问题，如下：

Access to fetch at 'http://localhost:5001/api/v0/add?stream-channels=true' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

则需要修改本地ipfs节点配置，使其支持跨域访问，修改方式如下：

# 进入 ipfs docker容器
~ % docker exec -it 24b518cb8ad9 /bin/sh

# 执行命令修改ipfs配置
/ \# ipfs config --json API.HTTPHeaders.Access-Control-Allow-Origin '["*"]'

# 重启ipfs-host容器
~ % docker restart 24b518cb8ad9

随后即可正常进行请求

参考文档：

• https://blog.youkuaiyun.com/kk3909/article/details/104814337