Crawler.Snapper (Crawler v1.1.2) View Source

Stores crawled pages offline.

Link to this section Summary

Functions

In order to store pages offline, it provides the following functionalities

Link to this section Functions

In order to store pages offline, it provides the following functionalities:

  • replaces all URLs to their equivalent relative paths
  • creates directories when necessary to store the files

Examples

iex> Snapper.snap("hello", %{save_to: tmp("snapper"), url: "http://hello-world.local"})
iex> File.read(tmp("snapper/hello-world.local", "index.html"))
{:ok, "hello"}

iex> Snapper.snap("hello", %{save_to: tmp("snapper"), url: "http://snapper.local/index.html"})
iex> File.read(tmp("snapper/snapper.local", "index.html"))
{:ok, "hello"}

iex> Snapper.snap("hello", %{save_to: "nope", url: "http://snapper.local/index.html"})
{:error, "Cannot write to file nope/snapper.local/index.html, reason: enoent"}

iex> Snapper.snap("hello", %{save_to: tmp("snapper"), url: "http://snapper.local/hello"})
iex> File.read(tmp("snapper/snapper.local/hello", "index.html"))
{:ok, "hello"}

iex> Snapper.snap("hello", %{save_to: tmp("snapper"), url: "http://snapper.local/hello1/"})
iex> File.read(tmp("snapper/snapper.local/hello1", "index.html"))
{:ok, "hello"}

iex> Snapper.snap(
iex>   "<a href='http://another.domain/page'></a>",
iex>   %{
iex>     save_to: tmp("snapper"),
iex>     url: "http://snapper.local/depth0",
iex>     depth: 1,
iex>     max_depths: 2,
iex>     html_tag: "a",
iex>     content_type: "text/html",
iex>   }
iex> )
iex> File.read(tmp("snapper/snapper.local/depth0", "index.html"))
{:ok, "<a href='../../another.domain/page/index.html'></a>"}

iex> Snapper.snap(
iex>   "<a href='https://another.domain:8888/page'></a>",
iex>   %{
iex>     save_to: tmp("snapper"),
iex>     url: "http://snapper.local:7777/dir/depth1",
iex>     depth: 1,
iex>     max_depths: 2,
iex>     html_tag: "a",
iex>     content_type: "text/html",
iex>   }
iex> )
iex> File.read(tmp("snapper/snapper.local-7777/dir/depth1", "index.html"))
{:ok, "<a href='../../../another.domain-8888/page/index.html'></a>"}