Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | 1x 66x 66x 34x 34x 34x 8x 34x 2x 2x 34x 2x 12x 2x 2x 14x 14x 14x 13x 1x 3x 1x 2x 8x 1x 1x 8x 1x 7x 3x 5x 4x 4x 4x 4x 1x 1x | import { Injectable, Inject } from '@angular/core';
import { IPFSConfig } from '../../domain/interfaces/ipfs.interface';
import { IPFS_CONFIG } from './ipfs-storage.service';
export interface ShareLinkOptions {
gateway?: string;
filename?: string;
download?: boolean;
}
@Injectable({
providedIn: 'root'
})
export class IPFSShareLinkService {
private readonly publicGateways = [
'https://ipfs.io',
'https://gateway.ipfs.io',
'https://cloudflare-ipfs.com',
'https://gateway.pinata.cloud',
'https://ipfs.fleek.co',
'https://ipfs.infura.io'
];
constructor(
@Inject(IPFS_CONFIG) private config: IPFSConfig
) {}
/**
* Generate a shareable IPFS link for a given CID
*/
generateShareLink(cid: string, options: ShareLinkOptions = {}): string {
const gateway = options.gateway || this.getDefaultGateway();
let link = `${gateway}/ipfs/${cid}`;
// Add filename parameter if provided (helps with browser downloads)
if (options.filename) {
link += `?filename=${encodeURIComponent(options.filename)}`;
}
// Add download parameter if requested
if (options.download) {
link += options.filename ? '&' : '?';
link += 'download=true';
}
return link;
}
/**
* Generate multiple share links for different gateways
*/
generateMultipleShareLinks(cid: string, options: ShareLinkOptions = {}): string[] {
return this.publicGateways.map(gateway =>
this.generateShareLink(cid, { ...options, gateway })
);
}
/**
* Get a shareable link for local IPFS node
*/
generateLocalShareLink(cid: string, options: ShareLinkOptions = {}): string {
const localGateway = this.config.gateway || 'http://127.0.0.1:8080';
return this.generateShareLink(cid, { ...options, gateway: localGateway });
}
/**
* Check if a CID is accessible via a gateway
*/
async checkGatewayAvailability(cid: string, gateway?: string): Promise<boolean> {
const url = this.generateShareLink(cid, { gateway });
try {
const response = await fetch(url, {
method: 'HEAD',
signal: AbortSignal.timeout(5000) // 5 second timeout
});
return response.ok;
} catch {
return false;
}
}
/**
* Find the first available gateway for a CID
*/
async findAvailableGateway(cid: string): Promise<string | null> {
// Check local gateway first
if (await this.checkGatewayAvailability(cid, this.config.gateway)) {
return this.config.gateway || 'http://127.0.0.1:8080';
}
// Check public gateways
for (const gateway of this.publicGateways) {
if (await this.checkGatewayAvailability(cid, gateway)) {
return gateway;
}
}
return null;
}
/**
* Get the default gateway based on configuration
*/
private getDefaultGateway(): string {
// If in gateway mode, use configured gateway
if (this.config.mode === 'gateway' && this.config.gateway) {
return this.config.gateway;
}
// Otherwise use a public gateway
return this.publicGateways[0];
}
/**
* Get list of available public gateways
*/
getPublicGateways(): string[] {
return [...this.publicGateways];
}
/**
* Format bytes to human readable string
*/
formatBytes(bytes: number): string {
if (bytes === 0) return '0 Bytes';
const k = 1024;
const sizes = ['Bytes', 'KB', 'MB', 'GB'];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}
/**
* Generate IPFS protocol link (for IPFS Companion browser extension)
*/
generateProtocolLink(cid: string): string {
return `ipfs://${cid}`;
}
/**
* Generate IPNS protocol link
*/
generateIPNSLink(name: string): string {
return `ipns://${name}`;
}
} |