下载已签名文档 API：签名 PDF

Python

from didit import Didit

# Reads DIDIT_API_KEY.
client = Didit()

content = client.sessions.signatures.download_document(
    "11111111-2222-3333-4444-555555555555",
    "feature_signature",
    "11111111-2222-3333-4444-555555555555",
)
with open("download.pdf", "wb") as file:
    file.write(content)

import { writeFile } from "node:fs/promises";
import Didit from "@didit-protocol/sdk-node";

// Reads DIDIT_API_KEY.
const didit = new Didit();

const content = await didit.sessions.signatures.downloadDocument(
  "11111111-2222-3333-4444-555555555555",
  "feature_signature",
  "11111111-2222-3333-4444-555555555555",
);
await writeFile("download.pdf", Buffer.from(await content.arrayBuffer()));

ctx := context.Background()
// Reads DIDIT_API_KEY.
client := didit.NewClient()

resp, err := client.Sessions.Signatures.DownloadDocument(ctx, "11111111-2222-3333-4444-555555555555", "feature_signature", "11111111-2222-3333-4444-555555555555")
if err != nil {
	log.Fatal(err)
}
defer resp.Body.Close()
file, err := os.Create("download.pdf")
if err != nil {
	log.Fatal(err)
}
defer file.Close()
if _, err := io.Copy(file, resp.Body); err != nil {
	log.Fatal(err)
}

import java.nio.file.Path;
import me.didit.Didit;

// Reads DIDIT_API_KEY.
Didit client = new Didit();

client.sessions().signatures().downloadDocument("11111111-2222-3333-4444-555555555555", "feature_signature", "11111111-2222-3333-4444-555555555555")
        .writeTo(Path.of("download.pdf"));

<?php

require 'vendor/autoload.php';

use Didit\DiditClient;

// Reads DIDIT_API_KEY.
$didit = new DiditClient();

$content = $didit->sessions->signatures->downloadDocument('11111111-2222-3333-4444-555555555555', 'feature_signature', '11111111-2222-3333-4444-555555555555');
$content->saveTo('download.pdf');

require "didit"

# Reads DIDIT_API_KEY.
didit = Didit::Client.new

content = didit.sessions.signatures.download_document(
  "11111111-2222-3333-4444-555555555555",
  "feature_signature",
  "11111111-2222-3333-4444-555555555555"
)
File.binwrite("download.pdf", content)

using System;
using Didit;

// Reads DIDIT_API_KEY.
using var client = new DiditClient();

var content = await client.Sessions.Signatures.DownloadDocumentAsync("11111111-2222-3333-4444-555555555555", "feature_signature", "11111111-2222-3333-4444-555555555555");
await content.SaveToAsync("download.pdf");

"<string>"

GET

session

{sessionId}

signatures

{nodeId}

documents

{documentId}

file

Python

from didit import Didit

# Reads DIDIT_API_KEY.
client = Didit()

content = client.sessions.signatures.download_document(
    "11111111-2222-3333-4444-555555555555",
    "feature_signature",
    "11111111-2222-3333-4444-555555555555",
)
with open("download.pdf", "wb") as file:
    file.write(content)

import { writeFile } from "node:fs/promises";
import Didit from "@didit-protocol/sdk-node";

// Reads DIDIT_API_KEY.
const didit = new Didit();

const content = await didit.sessions.signatures.downloadDocument(
  "11111111-2222-3333-4444-555555555555",
  "feature_signature",
  "11111111-2222-3333-4444-555555555555",
);
await writeFile("download.pdf", Buffer.from(await content.arrayBuffer()));

ctx := context.Background()
// Reads DIDIT_API_KEY.
client := didit.NewClient()

resp, err := client.Sessions.Signatures.DownloadDocument(ctx, "11111111-2222-3333-4444-555555555555", "feature_signature", "11111111-2222-3333-4444-555555555555")
if err != nil {
	log.Fatal(err)
}
defer resp.Body.Close()
file, err := os.Create("download.pdf")
if err != nil {
	log.Fatal(err)
}
defer file.Close()
if _, err := io.Copy(file, resp.Body); err != nil {
	log.Fatal(err)
}

import java.nio.file.Path;
import me.didit.Didit;

// Reads DIDIT_API_KEY.
Didit client = new Didit();

client.sessions().signatures().downloadDocument("11111111-2222-3333-4444-555555555555", "feature_signature", "11111111-2222-3333-4444-555555555555")
        .writeTo(Path.of("download.pdf"));

<?php

require 'vendor/autoload.php';

use Didit\DiditClient;

// Reads DIDIT_API_KEY.
$didit = new DiditClient();

$content = $didit->sessions->signatures->downloadDocument('11111111-2222-3333-4444-555555555555', 'feature_signature', '11111111-2222-3333-4444-555555555555');
$content->saveTo('download.pdf');

require "didit"

# Reads DIDIT_API_KEY.
didit = Didit::Client.new

content = didit.sessions.signatures.download_document(
  "11111111-2222-3333-4444-555555555555",
  "feature_signature",
  "11111111-2222-3333-4444-555555555555"
)
File.binwrite("download.pdf", content)

using System;
using Didit;

// Reads DIDIT_API_KEY.
using var client = new DiditClient();

var content = await client.Sessions.Signatures.DownloadDocumentAsync("11111111-2222-3333-4444-555555555555", "feature_signature", "11111111-2222-3333-4444-555555555555");
await content.SaveToAsync("download.pdf");

"<string>"

返回某份证件的已签署 PDF，前提是其签署人已完成签署。您无需自行构建 URL：决策中每份已签署证件的路径都位于 signatures[].documents[].signed_file 中。

curl -L 'https://verification.didit.me/v3/session/{session_id}/signatures/{node_id}/documents/{document_id}/file/' \
  -H 'x-api-key: YOUR_API_KEY' \
  -o agreement-signed.pdf

该 PDF 包含签署人查看的证件，并印有其字段值，以及证据页（除非该步骤的 signature_evidence_page 已关闭）。高级（AES）PDF 还包含带时间戳的 PAdES 签名；简单 PDF 没有数字签名、印章或时间戳。返回文件前，Didit 会将存储文件与 sha256_signed 进行核对。如果两者不一致，则返回 409 及 signature_document_changed。尚未签署的证件会返回 404 及 signature_not_signed。在您删除会话后，该路由将返回 404。

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