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
debugLogFilePath: String!

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.

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DropCustomTags
dropCustomTags: Bool

If set to true, then any non-standard HTML tags will be dropped when converting to XML.

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Html
html: String!

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.

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LastErrorHtml
lastErrorHtml: String! (read-only)

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.

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LastErrorText
lastErrorText: String! (read-only)

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.

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LastErrorXml
lastErrorXml: String! (read-only)

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.

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LastMethodSuccess
lastMethodSuccess: Bool

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.

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Nbsp
nbsp: Int

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 &#160. If set to 2, then &nbps;'s are dropped. If set to 3, then &nbsp's are left unmodified.

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VerboseLogging
verboseLogging: Bool

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.

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Version
version: String! (read-only)

Version of the component/library, such as "10.1.0"

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XmlCharset
xmlCharset: String!

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.

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Methods

ConvertFile
convertFile(inHtmlPath: String, destXmlPath: String) -> Bool

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.

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DropTagType
dropTagType(tagName: String)

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.

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DropTextFormattingTags
dropTextFormattingTags()

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.

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ReadFile
readFile(path: String) -> NSData

Convenience method for reading a complete file into a byte array.

Returns nil on failure

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ReadFileToString
readFile(to: String, srcCharset: String) -> String

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

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SetHtmlBd
setHtmlBd(bd: CkoBinData) -> Bool
Introduced in version 9.5.0.77

Sets the Html property from the contents of bd.

Returns true for success, false for failure.

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SetHtmlBytes
setHtmlBytes(inData: NSData)

Sets the Html property from a byte array.

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SetHtmlFromFile
setHtmlFromFile(path: String) -> Bool

Sets the Html property by loading the HTML from a file.

Returns true for success, false for failure.

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SetHtmlSb
setHtmlSb(sb: CkoStringBuilder) -> Bool
Introduced in version 9.5.0.97

Sets the Html property from the contents of sb.

Returns true for success, false for failure.

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ToXml
toXml() -> String

Converts the HTML in the "Html" property to XML and returns the XML string.

Returns nil on failure

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ToXmlSb
toXmlSb(sb: CkoStringBuilder) -> Bool
Introduced in version 9.5.0.77

Converts the HTML in the "Html" property to XML and appends the XML to sb.

Returns true for success, false for failure.

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UndropTagType
undropTagType(tagName: String)

Causes a specified type of tag to NOT be dropped in the output XML.

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UndropTextFormattingTags
undropTextFormattingTags()

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.

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WriteFile
writeFile(path: String, fileData: NSData) -> Bool

Convenience method for saving a byte array to a file.

Returns true for success, false for failure.

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WriteStringToFile
writeString(toFile: String, path: String, charset: String) -> Bool

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.

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Xml
xml() -> String

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

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