NGCS routes 1.0.3

Image API

Route definitions for the IIIF Image API.

Here we define our route definitions for the IIIF Image API as defined in: http://iiif.io/api/image/2.1/

The Image Request URI Syntax will work as the following example illustrate.

{scheme}://{server}{/prefix}/{identifier}/{region}/{size}/{rotation}/{quality}.{format}

e.g. http://www.example.org/image-service/abcd1234/full/full/0/default.jpg

Image base

get/^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))(\/)?$/i

Redirect to information page.

Handler

 async ctx => {
  let url = ctx.request.url;
  // If the url ends with a slash, cut it of.
  if (url.length - 1 === url.lastIndexOf('/')) {
    url = url.slice(0, -1);
  }
  ctx.status = 302;
  ctx.redirect(`${url}/info.json`);
}
End of GET /^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))(\/)?$/iBack to top

Image information

get/^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))\/info.json$/i

Full information for the image in the json format.

Handler

 async ctx => {
  try {
    // Fill up the response body with the information.
    ctx.body = await imageApi.getImageInfo(utilsMain.getUrlParams(ctx.request.url).id,
                                           ctx.request.url);
    // We set the content type after the body, otherwise it will be set
    // to application/json automatically.
    ctx.set('content-type', 'application/ld+json; charset=utf-8');
  } catch (error) {
    /* It's possible that an Error is thrown while creating the image data.
       We expect a boom object here. */
    if (error.isBoom) {
      ctx.status = error.output.statusCode;
      ctx.body = error.output.payload.message;
    } else {
      /* istanbul ignore next */
      throw error;
    }
  }
}
End of GET /^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))\/info.json$/iBack to top

Get the image.

get/^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))\/(full|square|(\d+,\d+,\d+,\d+)|pct:((\d+)(?:\.\d+)?,(\d+)(?:\.\d+)?,(\d+)(?:\.\d+)?,(\d+)(?:\.\d+)?))\/(full|max|(\d+,)|(,\d+)|(pct:\d+)|(\d+,\d+)|(!\d+,\d+))\/(\d{1,3}(?:\.\d+)?|!\d{1,3}(?:\.\d+)?)\/[a-zA-Z]+\.[a-zA-Z]+$/i

Get the image with the given id with the transformations in the path.

Query: Object

Key = defaultType* (tests) in [valids] not in [invalids]EaxmplesDescription
highlightstring [regex([object Object])]
highlightColorstring [regex([object Object])]

Handler

 async ctx => {
  try {
    const urlParams = utilsMain.getUrlParams(ctx.request.url);
    const imageData = await imageApi.getImageData(ctx);
    const filename = utilsImage.buildImageFilename(urlParams);
    ctx.set('content-type', `image/${urlParams.format}`);
    ctx.set('content-disposition', `inline; filename: "${filename}"`);
    ctx.set('content-length', new String(imageData).length);
    ctx.body = imageData;
  } catch (error) {
    /* It's possible that an Error is thrown while creating the image data.
       We expect a boom object here. */
    if (error.isBoom) {
      ctx.status = error.output.statusCode;
      ctx.body = error.output.payload.message;
    } else {
      /* istanbul ignore next */
      throw error;
    }
  }
}
End of GET /^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))\/(full|square|(\d+,\d+,\d+,\d+)|pct:((\d+)(?:\.\d+)?,(\d+)(?:\.\d+)?,(\d+)(?:\.\d+)?,(\d+)(?:\.\d+)?))\/(full|max|(\d+,)|(,\d+)|(pct:\d+)|(\d+,\d+)|(!\d+,\d+))\/(\d{1,3}(?:\.\d+)?|!\d{1,3}(?:\.\d+)?)\/[a-zA-Z]+\.[a-zA-Z]+$/iBack to top

Miscellaneous

Miscellaneous route definitions that are not included in the IIIF Image API.

The server have beside the implementation of the IIIF Image API some extra functionalities.

Server information

get/

A basic description what is this service for and where are more information are provide.

Handler

   async ctx => {
    ctx.body = `This is the NGCS-Chula, an image server that implements the IIIF
Image API Level 2. See <https://iiif.io/api/image/2.1/> for details and
<https://ngcs-beta.staatsbibliothek-berlin.de/docs> for further implemented methods.`;
  }
End of GET /Back to top

Logo

get/^(\/dc|\/zefys|)\/logo(\/)?$/i

Logo image of the SBB.

Handler

 async ctx => {
  const client = utilsClients.getClient(ctx.request.url);
  const imageLogo = client.getImageLogo();
  ctx.set('content-type', 'image/png');
  ctx.set('content-disposition', `inline; filename: ${imageLogo.filename}`);
  ctx.set('content-length', new String(imageLogo.imageData).length);
  ctx.body = imageLogo.imageData;
}
End of GET /^(\/dc|\/zefys|)\/logo(\/)?$/iBack to top

Download images as ZIP.

get/\/(dc\/|)download\/zip/

Get a ZIP file containing images and metadata of a specified PPN.

Query: Object

Key = defaultType* (tests) in [valids] not in [invalids]EaxmplesDescription
ppnstring * [alphanum(),min(9),max(13)]
rangestring [length(9)]

Handler

 async ctx => {
  try {
    await zip(ctx);
  } catch (error) {
    if (error.isBoom) {
      ctx.status = error.output.statusCode;
      ctx.body = error.output.payload.message;
    } else {
      // istanbul ignore next
      throw error;
    }
  }
}
End of GET /\/(dc\/|)download\/zip/Back to top

Download images as PDF.

get/^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6})).(pdf)$/

Get a PDF file containing images specified ID.

Handler

 async ctx => {
  try {
    const client = utilsClients.getClient(ctx.request.url);
    let headerContentDisposition = 'attachment';

    try {
      filename = await client.getPdfFilename(ctx.request.url);
      headerContentDisposition += `; filename: "${filename}"`;
    } catch (err) {
      //app.logger.warn(`[ZEFYS][PDF] No method found to build attachment filename`);
    }

    ctx.set('content-type', 'application/pdf');
    ctx.set('content-disposition', headerContentDisposition);
    await client.getPdf(ctx);
  } catch (error) {
    ctx.set('content-type', 'text/plain');
    ctx.remove('content-disposition');
    if (error.isBoom) {
      ctx.status = error.output.statusCode;
      ctx.body = error.output.payload.message;
    } else {
      // istanbul ignore next
      throw error;
    }
  }
}
End of GET /^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6})).(pdf)$/Back to top

Download IIIF manifest.

get/^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)))\/manifest$/

Get a JSON file for the specified id.

Handler

 async ctx => {
  try {
    const client = utilsClients.getClient(ctx.request.url);
    const urlParams = utilsMain.getUrlParams(ctx.request.url);
    const filename = `${urlParams.id}.manifest.json`;
    ctx.set('content-type', 'application/ld+json; charset=utf-8');
    ctx.set('content-disposition', `attachment; filename="${filename}"`);
    ctx.body = await client.getIIIFManifest(ctx);
  } catch (error) {
    ctx.set('content-type', 'text/plain');
    ctx.remove('content-disposition');
    if (error.isBoom) {
      ctx.status = error.output.statusCode;
      ctx.body = error.output.payload.message;
    } else {
      // istanbul ignore next
      throw error;
    }
  }
}
End of GET /^(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)))\/manifest$/Back to top

Delete images from the cache.

get/^((\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))|(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)))).delete.cache$/

Can be called for a specific image or for an object.

Handler

 async ctx => {
  try {
    const urlParams = utilsMain.getUrlParams(ctx.request.url);
    const imageId = urlParams.id.replace('.delete.cache', '');
    const app = require('../app');
    utilsImage.deleteImagesFromCache(app.config.cache.directory, imageId);
    ctx.set('content-type', 'application/json; charset=utf-8');
    ctx.body = {"ack": true};
  } catch (error) {
    ctx.set('content-type', 'text/plain');
    ctx.remove('content-disposition');
    if (error.isBoom) {
      ctx.status = error.output.statusCode;
      ctx.body = error.output.payload.message;
    } else {
      // istanbul ignore next
      throw error;
    }
  }
}
End of GET /^((\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6}))|(\/dc|\/zefys|)((\/(PPN|)\d{8,9}(\d{1}|X)))).delete.cache$/Back to top

Plugins

Route definitions from the plugins.

The server can have extra routes in the extensible plugins.

Logo small

get/^\/dc\/logo-small(\/)?$/i

Small logo image of the SBB.

Handler

 async ctx => {
  const client = utilsClients.getClient(ctx.request.url);
  const imageLogo = client.getImageLogoSmall();
  ctx.set('content-type', 'image/png');
  ctx.set('content-disposition', `inline; filename: ${imageLogo.filename}`);
  ctx.set('content-length', new String(imageLogo.imageData).length);
  ctx.body = imageLogo.imageData;
}
End of GET /^\/dc\/logo-small(\/)?$/iBack to top

Download METS file as xml.

get/^\/dc\/(PPN|)\d{8,9}(\d{1}|X).mets.xml$/

Get a XML (METS) file for the specified object id.

Handler

async ctx => {
     try {
         const client = utilsClients.getClient(ctx.request.url);
         let filename = ctx.request.url.split('/')[2].split('.')[0];
         ctx.set('content-type', 'application/xml; charset=utf-8');
         ctx.set('content-disposition', `attachment; filename="sbb-mets-${filename}.xml"`);
         ctx.body = await client.getMetsFile(ctx);
     } catch (error) {
         ctx.set('content-type', 'text/plain');
         ctx.remove('content-disposition');
         if (error.isBoom) {
             ctx.status = error.output.statusCode;
             ctx.body = error.output.payload.message;
         } else {
             // istanbul ignore next
             throw error;
         }
     }
 }
End of GET /^\/dc\/(PPN|)\d{8,9}(\d{1}|X).mets.xml$/Back to top

Download OCR file as xml.

get/^\/dc\/(PPN|)\d{8,9}(\d{1}|X)-(\d{4}|\d{8}).ocr.xml$/

Get a XML (ALTO) file for the specified object id.

Handler

async ctx => {
     try {
         const client = utilsClients.getClient(ctx.request.url);
         let filename = ctx.request.url.split('/')[2].split('.')[0];
         ctx.set('content-type', 'application/xml; charset=utf-8');
         ctx.set('content-disposition', `attachment; filename="sbb-ocr-alto-${filename}.xml"`);
         ctx.body = await client.getOcrFile(ctx);
     } catch (error) {
         ctx.set('content-type', 'text/plain');
         ctx.remove('content-disposition');
         if (error.isBoom) {
             ctx.status = error.output.statusCode;
             ctx.body = error.output.payload.message;
         } else {
             // istanbul ignore next
             throw error;
         }
     }
 }
End of GET /^\/dc\/(PPN|)\d{8,9}(\d{1}|X)-(\d{4}|\d{8}).ocr.xml$/Back to top

Download OCR files as zip.

get/^\/dc\/(PPN|)\d{8,9}(\d{1}|X).ocr.zip$/

Get a ZIP file for the specified object id containing all ALTO files of the OCR.

Query: Object

Key = defaultType* (tests) in [valids] not in [invalids]EaxmplesDescription
rangestring [length(9)]

Handler

async ctx => {
     try {
         const client = utilsClients.getClient(ctx.request.url);
         await client.getOcrZip(ctx);
     } catch (error) {
         ctx.set('content-type', 'text/plain');
         ctx.remove('content-disposition');
         if (error.isBoom) {
             ctx.status = error.output.statusCode;
             ctx.body = error.output.payload.message;
         } else {
             // istanbul ignore next
             throw error;
         }
     }
 }
End of GET /^\/dc\/(PPN|)\d{8,9}(\d{1}|X).ocr.zip$/Back to top

Download OCR files as text.

get/^\/dc\/(PPN|)\d{8,9}(\d{1}|X).ocr.txt$/

Get a TXT file for the specified object id containing all OCR as simple text.

Handler

async ctx => {
     try {
         const client = utilsClients.getClient(ctx.request.url);
         let filename = ctx.request.url.split('/')[2].split('.')[0];
         ctx.set('content-type', 'text/plain; charset=utf-8');
         ctx.set('content-disposition', `attachment; filename="sbb-${filename}.ocr.txt"`);
         ctx.body = await client.getOcrTxt(ctx);
     } catch (error) {
         ctx.set('content-type', 'text/plain');
         ctx.remove('content-disposition');
         if (error.isBoom) {
             ctx.status = error.output.statusCode;
             ctx.body = error.output.payload.message;
         } else {
             // istanbul ignore next
             throw error;
         }
     }
 }
End of GET /^\/dc\/(PPN|)\d{8,9}(\d{1}|X).ocr.txt$/Back to top

Download XML.

get/^\/zefys((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6})).xml$/

Get a XML file for the specified image (ALTO) or issue (METS).

Handler

async ctx => {
     try {
         const client = utilsClients.getClient(ctx.request.url);
         const filename = ctx.request.url.split('/')[2];
         ctx.set('content-type', 'application/xml; charset=utf-8');
         ctx.set('content-disposition', `attachment; filename: "${filename}"`);
         await client.getXml(ctx);
     } catch (error) {
         ctx.set('content-type', 'text/plain');
         ctx.remove('content-disposition');
         if (error.isBoom) {
             ctx.status = error.output.statusCode;
             ctx.body = error.output.payload.message;
         } else {
             // istanbul ignore next
             throw error;
         }
     }
 }
End of GET /^\/zefys((\/(PPN|)\d{8,9}(\d{1}|X)-(((\d{4}|\d{8}))|(,(\d{4}|\d{8}))|((\d{4}|\d{8}),)|((\d{4}|\d{8}),(\d{4}|\d{8}))))|(\/SNP([a-zA-Z0-9-]*){6})).xml$/Back to top