Download submission file

//native

type Formstack = {

  token: string;

};

/**

 * /download/:submission_id/:field_id/:index

 * Download submitted file for a specific submission. Returns binary encoding of file.

 */

export async function main(

  auth: Formstack,

  submission_id: string,

  field_id: string,

  index: string,

  encryption_password: string | undefined,

) {

  const url = new URL(

    `https://www.formstack.com/api/v2/download/${submission_id}/${field_id}/${index}`,

  );

  for (const [k, v] of [["encryption_password", encryption_password]]) {

    if (v !== undefined && v !== "" && k !== undefined) {

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Bearer " + auth.token,

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.text();

}