PDF to HTML / Golang Reference

Availability: API client version >= 5.4.0

class PdfToHtmlClient

All setter methods return PdfToHtmlClient object unless specified otherwise.

Constructor

func NewPdfToHtmlClient(userName string, apiKey string) PdfToHtmlClient
Constructor for the Pdfcrowd API client.
userName
Your username at Pdfcrowd.
apiKey
Your API key.

Conversion Input

func (client *PdfToHtmlClient) ConvertUrl(url string) ([]byte, error)
Convert a PDF.
url
The address of the PDF to convert.
The supported protocols are http:// and https://.
Returns
  • []byte - Byte array containing the conversion output. 
func (client *PdfToHtmlClient) ConvertUrlToStream(url string, outStream io.Writer) error
Convert a PDF and write the result to an output stream.
url
The address of the PDF to convert.
The supported protocols are http:// and https://.
outStream
The output stream that will contain the conversion output. 
func (client *PdfToHtmlClient) ConvertUrlToFile(url string, filePath string) error
Convert a PDF and write the result to a local file.
url
The address of the PDF to convert.
The supported protocols are http:// and https://.
filePath
The output file path.
The converter generates an HTML or ZIP file. If ZIP file is generated, the file path must have a ZIP or zip extension.
func (client *PdfToHtmlClient) ConvertFile(file string) ([]byte, error)
Convert a local file.
file
The path to a local file to convert.
The file must exist and not be empty.
Returns
  • []byte - Byte array containing the conversion output. 
func (client *PdfToHtmlClient) ConvertFileToStream(file string, outStream io.Writer) error
Convert a local file and write the result to an output stream.
file
The path to a local file to convert.
The file must exist and not be empty.
outStream
The output stream that will contain the conversion output. 
func (client *PdfToHtmlClient) ConvertFileToFile(file string, filePath string) error
Convert a local file and write the result to a local file.
file
The path to a local file to convert.
The file must exist and not be empty.
filePath
The output file path.
The converter generates an HTML or ZIP file. If ZIP file is generated, the file path must have a ZIP or zip extension.
func (client *PdfToHtmlClient) ConvertRawData(data []byte) ([]byte, error)
Convert raw data.
data
The raw content to be converted.
Returns
  • []byte - Byte array with the output. 
func (client *PdfToHtmlClient) ConvertRawDataToStream(data []byte, outStream io.Writer) error
Convert raw data and write the result to an output stream.
data
The raw content to be converted.
outStream
The output stream that will contain the conversion output. 
func (client *PdfToHtmlClient) ConvertRawDataToFile(data []byte, filePath string) error
Convert raw data to a file.
data
The raw content to be converted.
filePath
The output file path.
The converter generates an HTML or ZIP file. If ZIP file is generated, the file path must have a ZIP or zip extension.
func (client *PdfToHtmlClient) ConvertStream(inStream io.Reader) ([]byte, error)
Convert the contents of an input stream.
inStream
The input stream with source data.
Returns
  • []byte - Byte array containing the conversion output. 
func (client *PdfToHtmlClient) ConvertStreamToStream(inStream io.Reader, outStream io.Writer) error
Convert the contents of an input stream and write the result to an output stream.
inStream
The input stream with source data.
outStream
The output stream that will contain the conversion output. 
func (client *PdfToHtmlClient) ConvertStreamToFile(inStream io.Reader, filePath string) error
Convert the contents of an input stream and write the result to a local file.
inStream
The input stream with source data.
filePath
The output file path.
The converter generates an HTML or ZIP file. If ZIP file is generated, the file path must have a ZIP or zip extension.

General Options

func (client *PdfToHtmlClient) SetPdfPassword(password string) *PdfToHtmlClient
Password to open the encrypted PDF file.
password
The input PDF password. 
func (client *PdfToHtmlClient) SetScaleFactor(factor int) *PdfToHtmlClient
Set the scaling factor (zoom) for the main page area.
factor
The percentage value.
Must be a positive integer number.
Default: 100 
func (client *PdfToHtmlClient) SetPrintPageRange(pages string) *PdfToHtmlClient
Set the page range to print.
pages
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") 
func (client *PdfToHtmlClient) SetDpi(dpi int) *PdfToHtmlClient
Set the output graphics DPI.
Availability: API client >= 5.16.0, converter >= 20.10. See versioning.
dpi
The DPI value.
Default: 144 
func (client *PdfToHtmlClient) SetImageMode(mode string) *PdfToHtmlClient
Specifies where the images are stored.
mode
The image storage mode.
Allowed values:
  • embed
    The images are embedded into the output HTML file.
  • separate
    The images are saved to separate files. In this mode the output of the conversion is a zip file containing the HTML and all image files.
  • none
    The images are ignored and not converted.
Default: embed 
func (client *PdfToHtmlClient) SetImageFormat(imageFormat string) *PdfToHtmlClient
Specifies the format for the output images.
Availability: API client >= 5.17.0, converter >= 20.10. See versioning.
imageFormat
The image format.
Allowed values:
  • png
  • jpg
  • svg
Default: png 
func (client *PdfToHtmlClient) SetCssMode(mode string) *PdfToHtmlClient
Specifies where the style sheets are stored.
mode
The style sheet storage mode.
Allowed values:
  • embed
    Style sheets are embedded into the output HTML file.
  • separate
    Style sheets are saved to separate files. In this mode the output of the conversion is a zip file containing the HTML and all style sheets.
Default: embed 
func (client *PdfToHtmlClient) SetFontMode(mode string) *PdfToHtmlClient
Specifies where the fonts are stored.
mode
The font storage mode.
Allowed values:
  • embed
    The fonts are embedded into the output HTML file.
  • separate
    The font are saved to separate files. In this mode the output of the conversion is a zip file containing HTML and all font files.
Default: embed 
func (client *PdfToHtmlClient) SetType3Mode(mode string) *PdfToHtmlClient
Sets the processing mode for handling Type 3 fonts.
Availability: API client >= 6.2.0, converter >= 24.04. See versioning.
mode
The type3 font mode.
Allowed values:
  • raster
    Rasters Type 3 fonts into images, ensuring an exact visual representation in the HTML output.
  • convert
    Attempts to convert Type 3 fonts to a web font, resulting in smaller file sizes with some possible visual discrepancies.
Default: raster 
func (client *PdfToHtmlClient) SetSplitLigatures(value bool) *PdfToHtmlClient
Converts ligatures, two or more letters combined into a single glyph, back into their individual ASCII characters.
value
Set to true to split ligatures.
Default: false 
func (client *PdfToHtmlClient) SetCustomCss(css string) *PdfToHtmlClient
Apply custom CSS to the output HTML document. It allows you to modify the visual appearance and layout. Tip: Using !important in custom CSS provides a way to prioritize and override conflicting styles.
Availability: API client >= 6.2.0, converter >= 24.04. See versioning.
css
A string containing valid CSS.
Example:
  • Set the main background color to azure.
    SetCustomCss("#page-container { background-color: azure; }") 
func (client *PdfToHtmlClient) SetHtmlNamespace(prefix string) *PdfToHtmlClient
Add the specified prefix to all id and class attributes in the HTML content, creating a namespace for safe integration into another HTML document. This ensures unique identifiers, preventing conflicts when merging with other HTML.
Availability: API client >= 6.3.0, converter >= 24.04. See versioning.
prefix
The prefix to add before each id and class attribute name.
Start with a letter or underscore, and use only letters, numbers, hyphens, underscores, or colons.
Examples:
  • SetHtmlNamespace("pdf1_")
  • SetHtmlNamespace("uniqueID123_") 
func (client *PdfToHtmlClient) IsZippedOutput() bool
A helper method to determine if the output file is a zip archive. The output of the conversion may be either an HTML file or a zip file containing the HTML and its external assets.
Returns
  • bool - True if the conversion output is a zip file, otherwise False. 
func (client *PdfToHtmlClient) SetForceZip(value bool) *PdfToHtmlClient
Enforces the zip output format.
value
Set to true to get the output as a zip archive.
Default: false 
func (client *PdfToHtmlClient) SetTitle(title string) *PdfToHtmlClient
Set the HTML title. The title from the input PDF is used by default.
title
The HTML title. 
func (client *PdfToHtmlClient) SetSubject(subject string) *PdfToHtmlClient
Set the HTML subject. The subject from the input PDF is used by default.
subject
The HTML subject. 
func (client *PdfToHtmlClient) SetAuthor(author string) *PdfToHtmlClient
Set the HTML author. The author from the input PDF is used by default.
author
The HTML author. 
func (client *PdfToHtmlClient) SetKeywords(keywords string) *PdfToHtmlClient
Associate keywords with the HTML document. Keywords from the input PDF are used by default.
keywords
The string containing the keywords.

Miscellaneous

func (client *PdfToHtmlClient) SetDebugLog(value bool) *PdfToHtmlClient
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.
value
Set to true to enable the debug logging.
Default: false 
func (client *PdfToHtmlClient) GetDebugLogUrl() string
Get the URL of the debug log for the last conversion.
Returns
  • string - The link to the debug log. 
func (client *PdfToHtmlClient) GetRemainingCreditCount() 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. 
func (client *PdfToHtmlClient) GetConsumedCreditCount() int
Get the number of credits consumed by the last conversion.
Returns
  • int - The number of credits. 
func (client *PdfToHtmlClient) GetJobId() string
Get the job id.
Returns
  • string - The unique job identifier. 
func (client *PdfToHtmlClient) GetPageCount() int
Get the number of pages in the output document.
Returns
  • int - The page count. 
func (client *PdfToHtmlClient) GetOutputSize() int
Get the size of the output in bytes.
Returns
  • int - The count of bytes. 
func (client *PdfToHtmlClient) GetVersion() string
Get the version details.
Returns
  • string - API version, converter version, and client version. 
func (client *PdfToHtmlClient) SetTag(tag string) *PdfToHtmlClient
Tag the conversion with a custom value. The tag is used in conversion statistics. A value longer than 32 characters is cut off.
tag
A string with the custom tag.
Example:
  • SetTag("client-1234") 
func (client *PdfToHtmlClient) SetHttpProxy(proxy string) *PdfToHtmlClient
A proxy server used by Pdfcrowd conversion process for accessing the source URLs with HTTP scheme. It can help to circumvent regional restrictions or provide limited access to your intranet.
proxy
The value must have format DOMAIN_OR_IP_ADDRESS:PORT.
Examples:
  • SetHttpProxy("myproxy.com:8080")
  • SetHttpProxy("113.25.84.10:33333") 
func (client *PdfToHtmlClient) SetHttpsProxy(proxy string) *PdfToHtmlClient
A proxy server used by Pdfcrowd conversion process for accessing the source URLs with HTTPS scheme. It can help to circumvent regional restrictions or provide limited access to your intranet.
proxy
The value must have format DOMAIN_OR_IP_ADDRESS:PORT.
Examples:
  • SetHttpsProxy("myproxy.com:443")
  • SetHttpsProxy("113.25.84.10:44333")

API Client Options

func (client *PdfToHtmlClient) SetConverterVersion(version string) *PdfToHtmlClient
Set the converter version. Different versions may produce different output. Choose which one provides the best output for your case.
Availability: API client >= 5.0.0. See versioning.
version
The version identifier.
Allowed values:
  • 24.04
    Version 24.04.
  • 20.10
    Version 20.10.
  • 18.10
    Version 18.10.
Default: 24.04 
func (client *PdfToHtmlClient) SetUseHttp(value bool) *PdfToHtmlClient
Specifies if the client communicates over HTTP or HTTPS with Pdfcrowd API.
value
Set to true to use HTTP.
Default: false

Warning

Using HTTP is insecure as data sent over HTTP is not encrypted. Enable this option only if you know what you are doing.

func (client *PdfToHtmlClient) SetUserAgent(agent string) *PdfToHtmlClient
Set a custom user agent HTTP header. It can be useful if you are behind a proxy or a firewall.
agent
The user agent string.
Default: pdfcrowd_go_client/6.3.0 (https://pdfcrowd.com) 
func (client *PdfToHtmlClient) SetProxy(host string, port int, userName string, password string) *PdfToHtmlClient
Specifies an HTTP proxy that the API client library will use to connect to the internet.
host
The proxy hostname.
port
The proxy port.
userName
The username.
password
The password. 
func (client *PdfToHtmlClient) SetRetryCount(count int) *PdfToHtmlClient
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.
count
Number of retries.
Default: 1
Example:
  • SetRetryCount(3)