@openai/agents-core/dist/sandbox/shared/media.mjs

The OpenAI Agents SDK is a lightweight yet powerful framework for building multi-agent workflows.

import { UserError } from "../../errors.mjs";
export const MAX_VIEW_IMAGE_BYTES = 10 * 1024 * 1024;
export function assertViewImageByteLength(path, byteLength) {
    if (byteLength > MAX_VIEW_IMAGE_BYTES) {
        throw new UserError(`Image file exceeds the 10 MB limit: ${path}`);
    }
}
export function imageOutputFromBytes(path, bytes) {
    assertViewImageByteLength(path, bytes.byteLength);
    const mediaType = sniffImageMediaType(bytes, path);
    if (!mediaType) {
        throw new UserError(`Unsupported image format for view_image: ${path}`);
    }
    return {
        type: 'image',
        image: {
            data: Uint8Array.from(bytes),
            mediaType,
        },
    };
}
export function sniffImageMediaType(bytes, path) {
    if (matchesBytes(bytes, 0, [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])) {
        return 'image/png';
    }
    if (matchesBytes(bytes, 0, [0xff, 0xd8, 0xff])) {
        return 'image/jpeg';
    }
    if (matchesAscii(bytes, 0, 'GIF87a') || matchesAscii(bytes, 0, 'GIF89a')) {
        return 'image/gif';
    }
    if (matchesAscii(bytes, 0, 'RIFF') && matchesAscii(bytes, 8, 'WEBP')) {
        return 'image/webp';
    }
    if (matchesAscii(bytes, 0, 'BM')) {
        return 'image/bmp';
    }
    if (matchesBytes(bytes, 0, [0x49, 0x49, 0x2a, 0x00]) ||
        matchesBytes(bytes, 0, [0x4d, 0x4d, 0x00, 0x2a]) ||
        matchesBytes(bytes, 0, [0x49, 0x49, 0x2b, 0x00]) ||
        matchesBytes(bytes, 0, [0x4d, 0x4d, 0x00, 0x2b])) {
        return 'image/tiff';
    }
    if (looksLikeSvg(bytes)) {
        return 'image/svg+xml';
    }
    return svgMediaTypeFromPath(path);
}
export async function toUint8Array(value) {
    if (!value) {
        return new Uint8Array();
    }
    if (value instanceof Uint8Array) {
        return Uint8Array.from(value);
    }
    if (value instanceof ArrayBuffer) {
        return new Uint8Array(value);
    }
    if (ArrayBuffer.isView(value)) {
        return new Uint8Array(value.buffer, value.byteOffset, value.byteLength);
    }
    if (typeof value === 'string') {
        return new TextEncoder().encode(value);
    }
    if (typeof Blob !== 'undefined' && value instanceof Blob) {
        return new Uint8Array(await value.arrayBuffer());
    }
    return Uint8Array.from(value);
}
function matchesAscii(bytes, offset, expected) {
    return matchesBytes(bytes, offset, Array.from(expected, (character) => character.charCodeAt(0)));
}
function matchesBytes(bytes, offset, expected) {
    if (offset < 0 || offset + expected.length > bytes.byteLength) {
        return false;
    }
    return expected.every((byte, index) => bytes[offset + index] === byte);
}
function looksLikeSvg(bytes) {
    const prefix = new TextDecoder()
        .decode(bytes.subarray(0, Math.min(bytes.byteLength, 512)))
        .trimStart()
        .toLowerCase();
    return prefix.startsWith('<svg') || /^<\?xml[\s\S]*<svg/u.test(prefix);
}
function svgMediaTypeFromPath(path) {
    const lowerPath = path?.trim().toLowerCase() ?? '';
    if (lowerPath.endsWith('.svg') || lowerPath.endsWith('.svgz')) {
        return 'image/svg+xml';
    }
    return null;
}
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