PDF to Image / Node.js Reference

class PdfToImageClient

All setter methods return PdfToImageClient object unless specified otherwise.

Constructor

function PdfToImageClient(userName, apiKey)

Constructor for the PDFCrowd API client.

Parameters:
  • userName - Your username at PDFCrowd.
  • apiKey - Your API key.

Conversion Input

function convertUrl(url, callbacks)

Convert an image.

Parameters:
  • url - The address of the image to convert.
    Constraint:
    • Supported protocols are http:// and https://.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertUrlToFile(url, filePath, callback)

Convert an image and write the result to a local file.

Parameters:
  • url - The address of the image to convert.
    Constraint:
    • Supported protocols are http:// and https://.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

function convertFile(file, callbacks)

Convert a local file.

Parameters:
  • file - The path to a local file to convert.
    Constraint:
    • The file must exist and not be empty.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertFileToFile(file, filePath, callback)

Convert a local file and write the result to a local file.

Parameters:
  • file - The path to a local file to convert.
    Constraint:
    • The file must exist and not be empty.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

function convertRawData(data, callbacks)

Convert raw data.

Parameters:
  • data (byte[]) - The raw content to be converted.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertRawDataToFile(data, filePath, callback)

Convert raw data to a file.

Parameters:
  • data (byte[]) - The raw content to be converted.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

function convertStream(inStream, callbacks)

Convert the contents of an input stream.

Parameters:
  • inStream (InputStream) - The input stream with source data.
  • callbacks - The object that defines the following functions:
    • data(readStream) - called when the output data can be read from readStream
    • error(message, statusCode) - called when an error occurs
    • end() - called when the conversion finishes
    The client library provides 2 helper functions that can be used here:
    • saveToFile(filePath[, callback]) - saves the output data to a file
      • filePath - the output file path
      • callback(err, filePath) - called when the conversion finishes
    • sendImageInHttpResponse(response, contentType, fileName[, disposition]) - sends the generated image in an HTTP response
      • response - the response object
      • contentType - the response content type
      • fileName - the desired file name
      • disposition - the response content disposition, can be "attachment" or "inline", the default is "attachment".

function convertStreamToFile(inStream, filePath, callback)

Convert the contents of an input stream and write the result to a local file.

Parameters:
  • inStream (InputStream) - The input stream with source data.
  • filePath - The output file path.
  • callback - The callback(error, filePath) function is called when the conversion finishes. The error object is present if an error occurred, filePath is the output file path.

Conversion Format

function setOutputFormat(outputFormat)

The format of the output file.

Parameter:
  • outputFormat
    Allowed Values:
    • png
    • jpg
    • gif
    • tiff
    • bmp
    • ico
    • ppm
    • pgm
    • pbm
    • pnm
    • psb
    • pct
    • ras
    • tga
    • sgi
    • sun
    • webp
    Default:
    png

General Options

function setPdfPassword(password)

Password to open the encrypted PDF file.

Parameter:
  • password - The input PDF password.

function setPrintPageRange(pages)

Set the page range to print.

Parameter:
  • pages
    Constraint:
    • A comma separated list of page numbers or ranges.
Examples:
  • Just the second page is printed: setPrintPageRange("2")
  • The first and the third page are printed: setPrintPageRange("1,3")
  • Everything except the first page is printed: setPrintPageRange("2-")
  • Just first 3 pages are printed: setPrintPageRange("-3")
  • Pages 3, 6, 7, 8 and 9 are printed: setPrintPageRange("3,6-9")

function setDpi(dpi)

Set the output graphics DPI.

Availability:
API client >= 5.16.0, converter >= 20.10. See versioning.
Parameter:
  • dpi (int) - The DPI value.
    Default:
    144

function isZippedOutput() { return bool; }

A helper method to determine if the output file from a conversion process is a zip archive. The conversion output can be either a single image file or a zip file containing one or more image files. This method should be called after the conversion has been successfully completed.

Returns:
bool - True if the conversion output is a zip archive, otherwise False.

function setForceZip(value)

Enforces the zip output format.

Parameter:
  • value (bool) - Set to true to get the output as a zip archive.
    Default:
    false

function setUseCropbox(value)

Use the crop box rather than media box.

Parameter:
  • value (bool) - Set to true to use crop box.
    Default:
    false

function setCropAreaX(x)

Set the top left X coordinate of the crop area in points.

Parameter:
  • x (int)
    Constraint:
    • Must be a positive integer or 0.
Example:
  • Start crop at 1.4 inches from left: setCropAreaX(100)

function setCropAreaY(y)

Set the top left Y coordinate of the crop area in points.

Parameter:
  • y (int)
    Constraint:
    • Must be a positive integer or 0.
Example:
  • Start crop at 1.4 inches from top: setCropAreaY(100)

function setCropAreaWidth(width)

Set the width of the crop area in points.

Parameter:
  • width (int)
    Constraint:
    • Must be a positive integer or 0.
    Default:
    PDF page width.
Example:
  • Narrow 1.4 inch crop width: setCropAreaWidth(100)

function setCropAreaHeight(height)

Set the height of the crop area in points.

Parameter:
  • height (int)
    Constraint:
    • Must be a positive integer or 0.
    Default:
    PDF page height.
Example:
  • Small 1.4 inch crop height: setCropAreaHeight(100)

function setCropArea(x, y, width, height)

Set the crop area. It allows to extract just a part of a PDF page.

Parameters:
  • x (int) - Set the top left X coordinate of the crop area in points.
    Constraint:
    • Must be a positive integer or 0.
  • y (int) - Set the top left Y coordinate of the crop area in points.
    Constraint:
    • Must be a positive integer or 0.
  • width (int) - Set the width of the crop area in points.
    Constraint:
    • Must be a positive integer or 0.
    Default:
    PDF page width.
  • height (int) - Set the height of the crop area in points.
    Constraint:
    • Must be a positive integer or 0.
    Default:
    PDF page height.

function setUseGrayscale(value)

Generate a grayscale image.

Parameter:
  • value (bool) - Set to true to generate a grayscale image.
    Default:
    false

Miscellaneous

function setDebugLog(value)

Turn on the debug logging. Details about the conversion are stored in the debug log. The URL of the log can be obtained from the getDebugLogUrl method or available in conversion statistics.

Parameter:
  • value (bool) - Set to true to enable the debug logging.
    Default:
    false

function getDebugLogUrl() { return string; }

Get the URL of the debug log for the last conversion.

Returns:
string - The link to the debug log.

function getRemainingCreditCount() { return int; }

Get the number of conversion credits available in your account.
This method can only be called after a call to one of the convertXtoY methods.
The returned value can differ from the actual count if you run parallel conversions.
The special value 999999 is returned if the information is not available.

Returns:
int - The number of credits.

function getConsumedCreditCount() { return int; }

Get the number of credits consumed by the last conversion.

Returns:
int - The number of credits.

function getJobId() { return string; }

Get the job id.

Returns:
string - The unique job identifier.

function getPageCount() { return int; }

Get the number of pages in the output document.

Returns:
int - The page count.

function getOutputSize() { return int; }

Get the size of the output in bytes.

Returns:
int - The count of bytes.

function getVersion() { return string; }

Get the version details.

Returns:
string - API version, converter version, and client version.

function setTag(tag)

Tag the conversion with a custom value. The tag is used in conversion statistics. A value longer than 32 characters is cut off.

Parameter:
  • tag - A string with the custom tag.
Example:
  • Track job in analytics: setTag("client-1234")

function setHttpProxy(proxy)

A proxy server used by the conversion process for accessing the source URLs with HTTP scheme. It can help to circumvent regional restrictions or provide limited access to your intranet.

Parameter:
  • proxy
    Constraint:
    • The value must have format DOMAIN_OR_IP_ADDRESS:PORT.
Examples:
  • Corporate proxy server: setHttpProxy("myproxy.com:8080")
  • Direct IP proxy connection: setHttpProxy("113.25.84.10:33333")

function setHttpsProxy(proxy)

A proxy server used by the conversion process for accessing the source URLs with HTTPS scheme. It can help to circumvent regional restrictions or provide limited access to your intranet.

Parameter:
  • proxy
    Constraint:
    • The value must have format DOMAIN_OR_IP_ADDRESS:PORT.
Examples:
  • Secure proxy for HTTPS: setHttpsProxy("myproxy.com:443")
  • Direct secure proxy IP: setHttpsProxy("113.25.84.10:44333")

API Client Options

function setUseHttp(value)

Specify whether to use HTTP or HTTPS when connecting to the PDFCrowd API.

Parameter:
  • value (bool) - Set to true to use HTTP.
    Default:
    false

function setClientUserAgent(agent)

Specifies the User-Agent HTTP header that the client library will use when interacting with the API.

Availability:
API client >= 6.4.0 See versioning.
Parameter:
  • agent - The user agent string.

function setUserAgent(agent)

Deprecated Replaced with: setClientUserAgent

Set a custom user agent HTTP header. It can be useful if you are behind a proxy or a firewall.

Parameter:
  • agent - The user agent string.
    Default:
    pdfcrowd_nodejs_client/6.5.3 (https://pdfcrowd.com)

function setProxy(host, port, userName, password)

Specifies an HTTP proxy that the API client library will use to connect to the internet.

Parameters:
  • host - The proxy hostname.
  • port (int) - The proxy port.
  • userName - The username.
  • password - The password.

function setRetryCount(count)

Specifies the number of automatic retries when the 502 or 503 HTTP status code is received. The status code indicates a temporary network issue. This feature can be disabled by setting to 0.

Parameter:
  • count (int) - Number of retries.
    Default:
    1
Example:
  • Retry failed requests three times: setRetryCount(3)