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I'm writing a program in which one of the components must be able to take a path it is given (such as /help/index.html, or /help/) and a relative path based on that location, (such as ../otherpage/index.html, or sub/dir/of/help/, or help2.html) and produce the absolute path implied by the relative path. Consider the following directory tree.
/
index.html
content.txt
help/
help1.html
help2.html
The file index.html contains a link like help/help1.html. The program is passed / or /index.html, and combines it with help/help1.html to get /help/help1.html.
Similarly, the file /help/help1.html has the link ../content.txt, from which the program needs to return /content.txt. Is there a reasonable way to do this?
Thank you. :)
Edit: Thank you to Stephen Weinberg! For everyone from the future, here's the code I used.
func join(source, target string) string {
if path.IsAbs(target) {
return target
}
return path.Join(path.Dir(source), target)
}
514
In simple words, an absolute path refers to the same location in a file system relative to the root directory, whereas a relative path points to a specific location in a file system relative to the current directory you are working on.
Combines two strings into a path. Combine(String, String, String) Combines three strings into a path. Combine(String, String, String, String) Combines four strings into a path.
An absolute path is defined as specifying the location of a file or directory from the root directory(/). In other words,we can say that an absolute path is a complete path from start of actual file system from / directory. Relative path is defined as the path related to the present working directly(pwd).
The path.Join when used with path.Dir should do what you want. See http://golang.org/pkg/path/#example_Join for an interactive example.
path.Join(path.Dir("/help/help1.html"), "../content.txt")
This will return /content.txt.
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