Add example script about setting and getting local storage state

examples/storage.py

@@ -0,0 +1,40 @@
+from scrapy import Spider, Request
+from scrapy.crawler import CrawlerProcess
+from scrapy_playwright.page import PageCoroutine
+
+
+class StorageSpider(Spider):
+    """
+    Set and get storage state
+    """
+    name = "storage"
+
+    def start_requests(self):
+        yield Request(
+            url="https://example.org",
+            meta={
+                "playwright": True,
+                "playwright_include_page": True,
+                "playwright_page_coroutines": [
+                    PageCoroutine("evaluate_handle", "window.localStorage.setItem('foo', 'bar');"),
+                ],
+            },
+        )
+
+    async def parse(self, response):
+        page = response.meta["playwright_page"]
+        return {"url": response.url, "storage_state": await page.context.storage_state()}
+
+
+if __name__ == "__main__":
+    process = CrawlerProcess(
+        settings={
+            "TWISTED_REACTOR": "twisted.internet.asyncioreactor.AsyncioSelectorReactor",
+            "DOWNLOAD_HANDLERS": {
+                "https": "scrapy_playwright.handler.ScrapyPlaywrightDownloadHandler",
+                # "http": "scrapy_playwright.handler.ScrapyPlaywrightDownloadHandler",
+            },
+        }
+    )
+    process.crawl(StorageSpider)
+    process.start()