HtmlToXml Swift Reference Documentation
CkoHtmlToXml
Current Version: 10.1.0
Class for converting HTML to well-formed XML for the purpose of programmatically extracting (scraping) information from any HTML page.
Object Creation
let obj = CkoHtmlToXml()!
Properties
DebugLogFilePath
If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.
Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.
Possible causes of hangs include:
- A timeout property set to 0, indicating an infinite timeout.
- A hang occurring within an event callback in the application code.
- An internal bug in the Chilkat code causing the hang.
DropCustomTags
If set to true, then any non-standard HTML tags will be dropped when converting to XML.
topHtml
The HTML to be converted by the ToXml method. To convert HTML to XML, first set this property to the HTML string and then call ToXml. The ConvertFile method can do file-to-file conversions.
topLastErrorHtml
Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastErrorText
Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
LastErrorXml
Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastMethodSuccess
Indicates the success or failure of the most recent method call: true means success, false means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.
topNbsp
Determines how to handle HTML entities. The default value, 0 will cause entites to be convert to normal space characters (ASCII value 32). If this property is set to 1, then 's will be converted to  . If set to 2, then &nbps;'s are dropped. If set to 3, then  's are left unmodified.
topVerboseLogging
If set to true, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is false. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.
topVersion
XmlCharset
The charset, such as "utf-8" or "iso-8859-1" of the XML to be created. If XmlCharset is empty, the XML is created in the same character encoding as the HTML. Otherwise the HTML is converted XML and converted to this charset.
topMethods
ConvertFile
Converts an HTML file to a well-formed XML file that can be parsed for the purpose of programmatically extracting information.
Returns true for success, false for failure.
topDropTagType
Allows for any specified tag to be dropped from the output XML. To drop more than one tag, call this method once for each tag type to be dropped.
topDropTextFormattingTags
Causes text formatting tags to be dropped from the XML output. Text formatting tags are: b, font, i, u, br, center, em, strong, big, tt, s, small, strike, sub, and sup.
ReadFile
ReadFileToString
Convenience method for reading a text file into a string. The character encoding of the text file is specified by srcCharset. Valid values, such as "iso-8895-1" or "utf-8" are listed at: List of Charsets.
Returns nil on failure
topSetHtmlBd
Sets the Html property from the contents of bd.
Returns true for success, false for failure.
SetHtmlBytes
Sets the Html property from a byte array.
topSetHtmlFromFile
Sets the Html property by loading the HTML from a file.
Returns true for success, false for failure.
topSetHtmlSb
ToXml
Converts the HTML in the "Html" property to XML and returns the XML string.
Returns nil on failure
ToXmlSb
Converts the HTML in the "Html" property to XML and appends the XML to sb.
Returns true for success, false for failure.
UndropTagType
Causes a specified type of tag to NOT be dropped in the output XML.
topUndropTextFormattingTags
Causes text formatting tags to NOT be dropped from the XML output. Text formatting tags are: b, font, i, u, br, center, em, strong, big, tt, s, small, strike, sub, and sup.
Important: Text formatting tags are dropped by default. Call this method to prevent text formatting tags from being dropped.
WriteFile
Convenience method for saving a byte array to a file.
Returns true for success, false for failure.
topWriteStringToFile
Convenience method for saving a string to a file. The character encoding of the output text file is specified by charset (the string is converted to this charset when writing). Valid values, such as "iso-8895-1" or "utf-8" are listed at: List of Charsets.
Returns true for success, false for failure.
topXml
This is the same as the "ToXml" method. It converts the HTML in the "Html" property to XML and returns the XML string.
Returns nil on failure
top