add script to upload packages to web server

scripts/populate_file_web_server.py

@@ -0,0 +1,319 @@
+import sys
+import os
+import time
+import argparse
+from http import HTTPStatus
+try:
+    import requests
+except ImportError:
+    print("requests module is not installed. script will fail to execute")
+
+#debug print level
+PRINT_LEVEL_ERROR         = "err"
+PRINT_LEVEL_WARN          = "warn"
+PRINT_LEVEL_INFO          = "info"
+PRINT_LEVEL_VERBOSE       = "verbose"
+
+PRINT_LEVEL_LUT = {PRINT_LEVEL_ERROR    : 1,
+                   PRINT_LEVEL_WARN     : 2,
+                   PRINT_LEVEL_INFO     : 3,
+                   PRINT_LEVEL_VERBOSE  : 4 }
+
+#return code
+RET_CODE_SUCCESS                = 0
+RET_CODE_CANNOT_CREATE_FILE     = -1
+RET_CODE_CANNOT_OPEN_FILE       = -2
+RET_CODE_HTTP_SERVER_ERROR      = -3
+RET_CODE_CANNOT_WRITE_FILE      = -4
+
+#constants
+RESOURCES_FILE_NAME       = 'versions-web'
+EXCLUDE_DIRECTORES        = ['fsroot', 'target']
+HASH_SEPARATOR            = '-'
+DEFAULT_INVALID_INPUT     = 'none'
+
+# global variables
+g_current_print_level     = PRINT_LEVEL_INFO
+
+#Script debug features (disabled by default)
+g_delete_resources_in_cache = True
+
+
+# global Classes
+class Resource:
+    def __init__(self, line, file):
+        self.file = file
+        temp=line.split("==")
+        assert(2==len(temp))
+        self.url=temp[0].strip()
+        self.hash=temp[1].strip()
+        temp=self.url.split("/")
+        assert(len(temp)>0)
+        self.name=temp[len(temp)-1]
+        #handle special scenarios
+        if 0 != self.name.count('?') == True:
+            temp = self.name.split("?")
+            self.name = temp[0]
+
+    def get_unique_name(self):
+        return self.name + HASH_SEPARATOR + self.hash
+
+    def get_url(self):
+        return self.url
+
+    def __str__(self):
+        ret_val = "Resource name: " + self.name + "\n"
+        ret_val += "File: " + self.file + "\n"
+        ret_val += "Hash: " + self.hash + "\n"
+        ret_val += "Full URL: " + self.url
+        return ret_val
+
+
+
+# Helper functions
+
+def info_print(msg):
+    if PRINT_LEVEL_LUT[g_current_print_level] >= PRINT_LEVEL_LUT[PRINT_LEVEL_INFO]:
+        print(msg)
+
+def info_print_in_place(msg):
+    if PRINT_LEVEL_LUT[g_current_print_level] >= PRINT_LEVEL_LUT[PRINT_LEVEL_INFO]:
+        print(msg, end='\r')
+
+def verbose_print(msg):
+    if PRINT_LEVEL_LUT[g_current_print_level] >= PRINT_LEVEL_LUT[PRINT_LEVEL_VERBOSE]:
+        print(msg)
+
+def warn_print(msg):
+    if PRINT_LEVEL_LUT[g_current_print_level] >= PRINT_LEVEL_LUT[PRINT_LEVEL_WARN]:
+        print(msg)
+
+def error_print(msg):
+    if PRINT_LEVEL_LUT[g_current_print_level] >= PRINT_LEVEL_LUT[PRINT_LEVEL_ERROR]:
+        print(msg)
+
+def create_dir_if_not_exist(dir):
+    if not os.path.exists(dir):
+        try:
+            os.mkdir(dir)
+        except:
+            warn_print("Cannot create directory " + dir)
+
+def delete_file_if_exist(file):
+
+    if os.path.exists(file):
+        try:
+            os.remove(file)
+        except:
+            warn_print("Cannot delete " + file)
+
+# Logic functions
+
+def generate_output_file(resources, dest_url_valid, dest_url, output_file_name):
+
+    try:
+        with open(output_file_name, 'w') as f:
+            for unique_name in resources.keys():
+                resource = resources[unique_name]
+                if True == dest_url_valid:
+                    line = dest_url
+                else:
+                    line = resource.get_url()
+                if line[-1] != '/':
+                    line += '/'
+                line += resource.name + "==" + resource.hash
+                f.write(line + '\n')
+    except:
+        warn_print(output_file_name + " cannot be created")
+        return RET_CODE_CANNOT_CREATE_FILE
+
+    f.close()
+
+    return RET_CODE_SUCCESS
+
+def upload_resource_to_server(resource_path, resource_name, user, key, server_url):
+
+    url_full_path = server_url + "/" + resource_name
+
+    try:
+        f = open(resource_path, 'rb')
+    except:
+        err_print("Cannot open " + resource_path)
+        return RET_CODE_CANNOT_OPEN_FILE
+
+    headers = {'Content-type': 'application', 'Slug': resource_name}
+    response = requests.put(url_full_path, data=f,
+                            headers=headers, auth=(user, key))
+
+    f.close()
+
+    if response.status_code != HTTPStatus.CREATED.value:
+        err_print(f"HTTP request returned status code {response.status_code}, expected {HTTPStatus.CREATED.value}")
+        return RET_CODE_HTTP_SERVER_ERROR
+
+    # JSON response empty only when status code is 204
+    reported_md5 = response.json().get('checksums', {}).get('md5')
+    file_md5 = resource_name.split(HASH_SEPARATOR)[-1]
+
+    # Check if server reports checksum, if so compare reported sum and the one
+    # specified in filename
+    if reported_md5 != None and reported_md5 != file_md5:
+        warn_print(f"Server reported file's chsum {reported_md5}, expected {file_md5}")
+
+
+    return RET_CODE_SUCCESS
+
+def download_external_resouce(resource, cache_path):
+
+    resource_path_in_cache = cache_path + os.sep + resource.get_unique_name()
+
+    r = requests.get(resource.get_url(), allow_redirects=True)
+
+    try:
+        f = open(resource_path_in_cache, 'wb')
+        f.write(r.content)
+        f.close()
+    except:
+        error_print("Cannot write " + resource_path_in_cache + " to cache")
+        resource_path_in_cache = "" #report error
+
+    return resource_path_in_cache
+
+def get_resources_list(resource_files_list):
+
+    resource_list = list()
+
+    for file_name in resource_files_list:
+        try:
+            with open(file_name, 'r') as f:
+                for line in f:
+                    resource_list.append(Resource(line, file_name))
+        except:
+            warn_print(file_name + " cannot be opened")
+
+    return resource_list
+
+def filter_out_dir(subdir):
+    ret_val = False
+
+    for exclude in EXCLUDE_DIRECTORES:
+        if exclude in subdir.split(os.sep):
+            ret_val = True
+            break
+
+    return ret_val
+
+def get_resource_files_list(serach_path):
+    resource_files_list = list()
+
+    for subdir, dirs, files in os.walk(serach_path):
+        for file in files:
+            if False == filter_out_dir(subdir) and RESOURCES_FILE_NAME == file:
+                file_full_path = os.path.join(subdir, file)
+                verbose_print("Found resource file :" + file_full_path)
+                resource_files_list.append(file_full_path)
+
+    return resource_files_list
+
+def parse_args():
+
+    parser = argparse.ArgumentParser(description='Various pre-steps for build compilation')
+
+    parser.add_argument('-s', '--source', default=".",
+                        help='Search path for ' + RESOURCES_FILE_NAME + ' files')
+
+    parser.add_argument('-c', '--cache', default="." + os.sep + "tmp",
+                        help='Path to cache for storing content before uploading to server')
+
+    parser.add_argument('-p', '--print', default=PRINT_LEVEL_INFO, 
+                        choices=[PRINT_LEVEL_ERROR, PRINT_LEVEL_WARN, PRINT_LEVEL_INFO, PRINT_LEVEL_VERBOSE],
+                        help='Print level verbosity')
+
+    parser.add_argument('-o', '--output', default=DEFAULT_INVALID_INPUT,
+                        help='Output file name to hold the list of packages')                    
+
+    parser.add_argument('-u', '--user', default=DEFAULT_INVALID_INPUT,
+                        help='User for server authentication')
+
+    parser.add_argument('-k', '--key', default=DEFAULT_INVALID_INPUT,
+                        help='API key server authentication')
+
+    parser.add_argument('-d', '--dest', default=DEFAULT_INVALID_INPUT,
+                        help='URL for destination web file server')
+
+    return parser.parse_args()
+
+def main():
+
+    global g_current_print_level 
+    ret_val = RET_CODE_SUCCESS
+    resource_counter = 0.0
+    resource_dict = dict()
+
+    args = parse_args()
+
+    g_current_print_level = args.print
+
+    resource_files_list = get_resource_files_list(args.source)
+
+    resource_list = get_resources_list(resource_files_list)
+
+    #remove duplications 
+    for resource in resource_list:
+        unique_name = resource.get_unique_name()
+        if not unique_name in resource_dict.keys():
+            resource_dict[unique_name] = resource
+
+    info_print("Found " + str(len(resource_files_list)) + " version files and " + str(len(resource_dict.keys())) + " unique resources")
+
+    if args.dest != DEFAULT_INVALID_INPUT:
+        upload_files_to_server = True
+        info_print("Upload files to URL - " + args.dest)
+    else:
+        upload_files_to_server = False
+        info_print("Skipping files upload to server")       
+
+    #create cache directory if not exist
+    create_dir_if_not_exist(args.cache)
+
+    #download content to cache and then upload to web server
+    for unique_name in resource_dict.keys():
+
+        resource = resource_dict[unique_name]
+
+        verbose_print(resource)
+
+        resource_counter += 1.0
+
+        #download content to cache
+        file_in_cache = download_external_resouce(resource, args.cache)
+
+        if "" == file_in_cache:
+            return RET_CODE_CANNOT_WRITE_FILE
+
+        if True == upload_files_to_server:
+            #upload content to web server
+            ret_val = upload_resource_to_server(file_in_cache, unique_name, args.user, args.key, args.dest)
+            if ret_val != RET_CODE_SUCCESS:
+                return ret_val
+
+        if True == g_delete_resources_in_cache:
+            delete_file_if_exist(file_in_cache)
+
+        info_print_in_place("Downloading Data. Progress " + str(int(100.0*resource_counter/len(resource_dict.keys()))) + "%") #print progress bar
+
+    # generate version output file as needed
+    if args.output != DEFAULT_INVALID_INPUT:
+        ret_val = generate_output_file(resource_dict, upload_files_to_server, args.dest, args.output)
+        info_print("Generate output file " + args.output)
+
+    return ret_val
+
+
+#    Entry function                                                
+if __name__ == '__main__':
+
+    ret_val = main()
+
+    sys.exit(ret_val)
+