scrapy: initial integration (google#10991)

Initial integration of scrapy.
@wRAR do you agree with this?

projects/scrapy/Dockerfile

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+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder-python
+RUN pip3 install --upgrade pip
+RUN git clone https://github.com/scrapy/scrapy.git scrapy
+COPY *.sh *py $SRC/
+WORKDIR $SRC/scrapy

projects/scrapy/build.sh

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+#!/bin/bash -eu
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+pip3 install .
+
+for fuzzer in $(find $SRC -name 'fuzz_*.py'); do
+  compile_python_fuzzer $fuzzer
+done

projects/scrapy/fuzz_crawl.py

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+# Copyright 2021 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+################################################################################
+
+import sys
+import atheris
+import scrapy
+from scrapy.crawler import CrawlerProcess
+
+class test_spider(scrapy.Spider):
+    start_urls = ['http://google.com', 'http://youtube.com/']
+
+    def parse(self, response):
+        pass
+
+def TestOneInput(data):
+  fdp = atheris.FuzzedDataProvider(data)
+  test = fdp.ConsumeUnicodeNoSurrogates(fdp.ConsumeIntInRange(0, 4096))
+
+  try:
+    process = CrawlerProcess(settings={
+        test
+    })
+    process.crawl(test_spider)
+    process.start()
+  except:
+    pass
+
+
+def main():
+  atheris.instrument_all()
+  atheris.Setup(sys.argv, TestOneInput)
+  atheris.Fuzz()
+
+
+if __name__ == "__main__":
+  main()

projects/scrapy/project.yaml

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+homepage: "https://scrapy.org/"
+language: python
+primary_contact: "wrar42@gmail.com"
+auto_ccs:
+  - "lbl4gojevic@gmail.com"
+fuzzing_engines:
+  - libfuzzer
+sanitizers:
+  - address
+  - undefined
+main_repo: "https://github.com/scrapy/scrapy.git"