Documentum / REST

Filename in Documentum REST Services

Alvaro de Andres1 Comment

If you have used Document REST Services you most likely have realized that downloading any content from an object return a “document”/”response” + dot + file extension.

You can check William Zhou’s answer here:

This had been discussed in the initial implementation but hadn’t been implemented since Content-Disposition response header is neither mandatory nor handled by all HTTP clients. Besides, it has some overhead to map the format/mime to a filename extension. But I think it has values helping for the download experience. It is appreciated if you can file a feature request CR so that we can discuss this with the product manager.

I’ve alredy raised a SR to support in order to get OpenText to consider adding this “feature”.

However, if you can’t/don’t want to wait, just “extend” com.emc.documentum.rest.controller.ContentMediaController adding the following line to the getContent method just before returning the response:

headers.setContentDispositionFormData("attachment", (String)co.getAttributeByName("object_name"));

and you’re good to go.

 

One thought on “Filename in Documentum REST Services”

  1. Using object name as file name seems not to be a good idea – we constantly facing with following challenges:
    * sometime customers want to generate object names according to other business data
    * in many cases 255 bytes are not enough for file names – so, most our object names do not contain extension part

    and I implemented following algorithm:

    private static String makeValidName(String fileName) {
    StringBuilder nameBuilder = new StringBuilder(fileName.length());
    for (char c : fileName.toCharArray()) {
        if (DfFile.isValidCharForFileName(c)) {
            nameBuilder.append(c);
        }
    }
    return nameBuilder.toString();
}

public static String makeFileName(String objectName, String extension) {
    objectName = makeValidName(objectName);
    if (StringUtils.isNotBlank(extension)) {
        if (!extension.startsWith(".")) {
            extension = "." + extension;
        }
    }

    int maxLength = 255;
    if (StringUtils.isNotBlank(extension)) {
        maxLength -= extension.length();
    }

    StringBuilder nameBuilder = new StringBuilder();

    int end = objectName.length();
    if (StringUtils.isNotBlank(extension)) {
        if (StringUtils.endsWithIgnoreCase(objectName, extension)) {
            end -= extension.length();
        }
    }

    if (StringUtils.isNotBlank(objectName)) {
        for (int i = 0; i < Math.min(end, maxLength); i++) {
            nameBuilder.append(objectName.charAt(i));
        }
    }

    if (nameBuilder.length() == 0) {
        nameBuilder.append("content");
    }
    if (StringUtils.isNotBlank(extension)) {
        nameBuilder.append(extension);
    }
    return nameBuilder.toString();
}

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