s3-style URL fix

docs/en/sql-reference/table-functions/s3.md

@@ -162,6 +162,28 @@ The below get data from all `test-data.csv.gz` files from any folder inside `my-
 SELECT * FROM s3('https://clickhouse-public-datasets.s3.amazonaws.com/my-test-bucket-768/**/test-data.csv.gz', 'CSV', 'name String, value UInt32', 'gzip');
 ```
 
+Note. It is possible to specify custom URL mappers in the server configuration file. Example: 
+``` sql
+SELECT * FROM s3('s3://clickhouse-public-datasets/my-test-bucket-768/**/test-data.csv.gz', 'CSV', 'name String, value UInt32', 'gzip');
+```
+The URL `'s3://clickhouse-public-datasets/my-test-bucket-768/**/test-data.csv.gz'` would be replaced to `'http://clickhouse-public-datasets.s3.amazonaws.com/my-test-bucket-768/**/test-data.csv.gz'`
+
+
+Custom mapper can be added into `config.xml`:
+``` xml
+<url_scheme_mappers>
+   <s3>
+      <to>https://{bucket}.s3.amazonaws.com</to>
+   </s3>
+   <gs>
+      <to>https://{bucket}.storage.googleapis.com</to>
+   </gs>
+   <oss>
+      <to>https://{bucket}.oss.aliyuncs.com</to>
+   </oss>
+</url_scheme_mappers>
+```
+
 ## Partitioned Write
 
 If you specify `PARTITION BY` expression when inserting data into `S3` table, a separate file is created for each partition value. Splitting the data into separate files helps to improve reading operations efficiency.

programs/server/config.xml

@@ -91,6 +91,18 @@
         </formatting> -->
     </logger>
 
+    <url_scheme_mappers>
+        <s3>
+            <to>https://{bucket}.s3.amazonaws.com</to>
+        </s3>
+        <gs>
+            <to>https://{bucket}.storage.googleapis.com</to>
+        </gs>
+        <oss>
+            <to>https://{bucket}.oss.aliyuncs.com</to>
+        </oss>
+    </url_scheme_mappers>
+
     <!-- Add headers to response in options request. OPTIONS method is used in CORS preflight requests. -->
     <!-- It is off by default. Next headers are obligate for CORS.-->
     <!-- http_options_response>

src/Common/Macros.cpp

@@ -1,3 +1,5 @@
+#include <algorithm>
+#include <unordered_map>
 #include <Poco/Util/AbstractConfiguration.h>
 #include <Common/Macros.h>
 #include <Common/Exception.h>
@@ -36,6 +38,11 @@ Macros::Macros(const Poco::Util::AbstractConfiguration & config, const String &
     }
 }
 
+Macros::Macros(std::map<String, String> map)
+{
+    macros = std::move(map);
+}
+
 String Macros::expand(const String & s,
                       MacroExpansionInfo & info) const
 {

src/Common/Macros.h

@@ -27,6 +27,7 @@ class Macros
 public:
     Macros() = default;
     Macros(const Poco::Util::AbstractConfiguration & config, const String & key, Poco::Logger * log = nullptr);
+    explicit Macros(std::map<String, String> map);
 
     struct MacroExpansionInfo
     {

src/IO/S3/URI.cpp

@@ -1,5 +1,8 @@
 #include <IO/S3/URI.h>
-
+#include <Poco/URI.h>
+#include "Common/Macros.h"
+#include <Interpreters/Context.h>
+#include <Storages/NamedCollectionsHelpers.h>
 #if USE_AWS_S3
 #include <Common/Exception.h>
 #include <Common/quoteString.h>
@@ -18,6 +21,15 @@
 namespace DB
 {
 
+struct URIConverter
+{
+    static void modifyURI(Poco::URI & uri, std::unordered_map<std::string, std::string> mapper)
+    {
+        Macros macros({{"bucket", uri.getHost()}});
+        uri = macros.expand(mapper[uri.getScheme()]).empty()? uri : Poco::URI(macros.expand(mapper[uri.getScheme()]) + "/" + uri.getPathAndQuery());
+    }
+};
+
 namespace ErrorCodes
 {
     extern const int BAD_ARGUMENTS;
@@ -46,6 +58,29 @@ URI::URI(const std::string & uri_)
 
     uri = Poco::URI(uri_);
 
+    std::unordered_map<std::string, std::string> mapper;
+    auto context = Context::getGlobalContextInstance();
+    if (context)
+    {
+        const auto *config = &context->getConfigRef();
+        if (config->has("url_scheme_mappers"))
+        {
+            std::vector<String> config_keys;
+            config->keys("url_scheme_mappers", config_keys);
+            for (const std::string & config_key : config_keys)
+                mapper[config_key] = config->getString("url_scheme_mappers." + config_key + ".to");
+        }
+        else
+        {
+            mapper["s3"] = "https://{bucket}.s3.amazonaws.com";
+            mapper["gs"] = "https://{bucket}.storage.googleapis.com";
+            mapper["oss"] = "https://{bucket}.oss.aliyuncs.com";
+        }
+
+        if (!mapper.empty())
+            URIConverter::modifyURI(uri, mapper);
+    }
+
     storage_name = S3;
 
     if (uri.getHost().empty())

tests/integration/test_s3_style_link/configs/config.d/minio.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+
+<!-- Using named collections 22.4+ -->
+<clickhouse>
+    <url_scheme_mappers>
+        <minio>
+            <to>http://minio1:9001/root/{bucket}</to>
+        </minio>
+    </url_scheme_mappers>
+</clickhouse>

tests/integration/test_s3_style_link/configs/users.d/users.xml

@@ -0,0 +1,9 @@
+<clickhouse>
+    <users>
+        <default>
+            <password></password>
+            <profile>default</profile>
+            <named_collection_control>1</named_collection_control>
+        </default>
+    </users>
+</clickhouse>

tests/integration/test_s3_style_link/test.py

@@ -0,0 +1,57 @@
+import logging
+import pytest
+from helpers.cluster import ClickHouseCluster
+
+
+cluster = ClickHouseCluster(__file__)
+node = cluster.add_instance(
+    "node",
+    main_configs=[
+        "configs/config.d/minio.xml",
+    ],
+    user_configs=[
+        "configs/users.d/users.xml",
+    ],
+    with_minio=True,
+)
+
+
+@pytest.fixture(scope="module")
+def started_cluster():
+    try:
+        logging.info("Starting cluster...")
+        cluster.start()
+        logging.info("Cluster started")
+
+        yield cluster
+    finally:
+        logging.info("Stopping cluster")
+        cluster.shutdown()
+        logging.info("Cluster stopped")
+
+
+def test_s3_table_functions(started_cluster):
+    """
+    Simple test to check s3 table function functionalities
+    """
+    node.query(
+        """
+            INSERT INTO FUNCTION s3
+                (
+                    'minio://data/test_file.tsv.gz', 'minio', 'minio123'
+                )
+            SELECT * FROM numbers(1000000);
+        """
+    )
+
+    assert (
+        node.query(
+            """
+            SELECT count(*) FROM s3
+            (
+                'minio://data/test_file.tsv.gz', 'minio', 'minio123'
+            );
+        """
+        )
+        == "1000000\n"
+    )