Tag Archives: anaconda

Failed to Create New Environment Error: Collecting package metadata (current_repodata.json): failed.

Recently, due to the need to set up a new environment for the GUI interface, an error occurred in the header line during the process of creating a new environment. 

The significance of creating a new environment
As each project requires different libraries and their versions, running the project in the root directory will be much more complicated, which is why many people will choose to use a virtual environment. That is, suppose you do project A with package versions PyQt5=’5.5.1′ and sklearn=’0.22.1′, and project B with package versions PyQt5=’5.6.1′ and sklearn=’0.23.1′, then you have to uninstall PyQt5 5.5.1 and sklearn0.22.1 and install PyQt5 5.6.1′ and sklearn0.23.1, but then you have to uninstall the previous package version to do something like project 1, so it’s a lot of trouble to go back and forth, so why not create virtual environment A with PyQt5 5.5.1 and sklearn0.22.1, virtual environment B with PyQt5 5.6.1′ and sklearn0.23.1, and do project A will use virtual environment A, and project B will use virtual environment B, which will not interfere with each other and improve the convenience a lot.

Question restatement:

If you have reinstalled anaconda, a file named .condarc will be automatically generated in the user directory on the C drive.
When using the commands conda install and conda create, the following problem occurs: Collecting package metadata (current_repodata.json): failed

First, a few words about the role of the .condarc file.

.condarc starts with a dot and generally indicates the configuration file for the conda application, in the user’s home directory (windows: C:\\users\\\username\\, linux: /home/username/).

For the .condarc configuration file, which is an optional (optional) runtime configuration file, this file is not available by default and is only created automatically after you have executed the conda config command. This file is the configuration file for conda in YAML format. For example, you can set the channel to install the package, whether to automatically update conda, whether to allow other channels, and other settings.

Solution:

1. Open Anaconda Prompt and enter the following command

conda config --show-sources

As shown in the figure, the running result is displayed that the .condarc file is in the C:\Users\DELL folder

2. Delete .condarc file

The problem was solved successfully!!!

[Solved] error in REfO setup command: use_2to3 is invalid.

Problem Description: When using pip command to install refo==0.13 version, it will show that it is installed as 0.12 version because 0.13 version only has .tar.gz file and no whl file, pip installation will select 0.12 version, while manually downloading 0.13 version .tar.gz file and installing offline, it will report an error, the following is the process of the problem.

Requirement: install refo==0.13 version

pip install refo
#It will automatically install 0.12, because 0.13 does not have xhl files

pip install refo==0.13
#Error in REfO setup command: use_2to3 is invalid.
error in REfO setup command: use_2to3 is invalid.

# Download the 0.13 .tar.gz file and install it offline with the same error.
error in REfO setup command: use_2to3 is invalid.

Check the data and the problem is:

setuptools>= 58 interrupt support use_2to3：

Setuptools change log for V58

setuptools should be updated to setuptools<Version 58 or avoid using use_2to3 set the package in the parameters.

Solution: Execute the following command:

pip install setuptools==56.0.0
#After execution, setuptools will automatically fall back to version 56.0.0

Then just install the refo==0.13 version.tar.gz file offline

Supplement the contents of the third-party package for offline installation:

Python third-party library download website Python third-party library

.whl file installation.

Go to the directory of the above whl file from the command line interface in one of the environments under anaconda where the library needs to be installed
Install the library using the command: pip install xxxxx.whl
.tar.gz file installation.

From the command line interface, go to the above extracted directory in the environment where the library is to be installed under anaconda
Use the command: python setup.py install

[Solved] Ubuntu conda ProxyError: Conda cannot proceed due to an error in your proxy configuration

Using conda install with a proxy may result in the following error:

ProxyError: Conda cannot proceed due to an error in your proxy configuration.
Check for typos and other configuration errors in any ‘.netrc’ file in your home directory,
any environment variables ending in ‘_PROXY’, and any other system-wide proxy
configuration settings.

 

Solution:
Input the command:env | grep -i "_PROXY" and here is the outcome:

HTTP_PROXY=http://http://localhost:8888/
https_proxy=http://http://localhost:8888/
http_proxy=http://http://localhost:8888/
no_proxy=localhost,127.0.0.0/8,::1
NO_PROXY=localhost,127.0.0.0/8,::1
HTTPS_PROXY=http://http://localhost:8888/

Then enter the command unset to delete these agents:

unset  https_proxy
unset  http_proxy
unset  no_proxy
unset  HTTPS_PROXY
unset  HTTP_PROXY
unset  NO_PROXY

Then enter CONDA installation command to solve the problem successfully

[Solved] ubuntu Boot Error: /dev/nume0n1p2:clean

This is an error that cannot be reported in the graphical interface. Sometimes this problem occurs when the driver or program is updated.

Solution:
Ctrl + Alt + F2 enter the command line, enter the user name and password, and then enter the update library: sudo apt update

update kernel:
sudo apt upgrade

check for updates:
sudo apt install - f

delete old kernel:
sudo apt autoremove

Restart: reboot
Congratulations on your success!

[Solved] Error: condahtterror: http 404 not found for URL

There is a problem when CONDA creates a new environment:

Solving environment: failed
CondaHTTPError: HTTP 404 NOT FOUND for url https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/noarch/repodata.json 26

Solution:

conda config --remove-key channels
conda config --append channels conda-forge --append channels bioconda --append channels defaults

[Solved] AnacondaShell Start Error: createfile()error: 5

Solution 1:

There is also a problem when you do not execute as an administrator:

CondaHTTPError: HTTP 000 CONNECTION FAILED for url

reason:

5 = access denied. See net helpmsg 5. You cannot write to the system32 folder unless you are an administrator.

Solution:

Run Anaconda shell with administrator privileges:

If you still haven’t solved the condahttpererror problem, please refer to:
CONDA create failed to create the environment httperror
the ultimate solution to the condahttpererror problem when Anaconda created the environment

Solution 2:

1. Open registry: regedit

2. Found: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System

3. Modify the key value under this path: enablelua is set from 1 to 0

VScode Run CONDA environment Error [How to Solve]

In the CONDA environment using vs code, running the program will report the following problems

conda activate base

CommandNotFoundError: Your shell has not been properly configured to use 'conda activate'.
If using 'conda activate' from a batch script, change your
invocation to 'CALL conda.bat activate'.

To initialize your shell, run

    $ conda init <SHELL_NAME>

Currently supported shells are:
  - bash
  - cmd.exe
  - fish
  - tcsh
  - xonsh
  - zsh
  - powershell

See 'conda init --help' for more information and options.

IMPORTANT: You may need to close and restart your shell after running 'conda init'.

After online search, the solution is as follows. Method 2 can be used for pro test:

Method 1:

Use the anaconda navigator or Anaconda PowerShell prompt provided by Anaconda to enter the environment, or enter CONDA Bat activate “environment path”, such as CONDA batactivate”D:\Anaconda3\envs\test”

Method 2:

Step 1:

Open the administrator power shell, modify the execution policy, execute: get executionpolicy, reply restricted, indicating that the status is prohibited

Restricted – default setting, no scripts are allowed to run
allsigned – only scripts signed by digital certificates can be run
remotesigned – local scripts do not need digital signatures, but scripts downloaded from the network must have digital signatures
unrestricted – all scripts are allowed to run

Step 2:

Execute: set executionpolicy remotesigned

Step 3:

Input: CONDA init

At this time, the configuration file profile will be generated under C:\users\XXX\documents\windowspowershell ps1

After restarting the power shell or vs code, it will enter the base environment of CONDA by default

Recovery:

Delete profile ps1.

According to personal conditions, execute the set executionpolicy restricted policy and change it back to restricted.

HDF5 library version mismatched error [How to Solve]

HDF5 library version mismatched error
Error Messages:

Warning! ***HDF5 library version mismatched error***
The HDF5 header files used to compile this application do not match
the version used by the HDF5 library to which this application is linked.
Data corruption or segmentation faults may occur if the application continues.
This can happen when an application was compiled by one version of HDF5 but
linked with a different version of static or shared HDF5 library.
You should recompile the application or check your shared library related
settings such as 'LD_LIBRARY_PATH'.
You can, at your own risk, disable this warning by setting the environment
variable 'HDF5_DISABLE_VERSION_CHECK' to a value of '1'.
Setting it to 2 or higher will suppress the warning messages totally.
Headers are 1.10.2, library is 1.10.5

Solution:

pip uninstall h5py
pip install h5py

[Solved] Conda install Error: An HTTP error occurred when trying to retrieve this URL. HTTP errors are often…

1. Problem Description: prepare to execute the following command in Anaconda prompt:

conda install -c stellargraph stellargraph

An HTTP error occurred when trying to retrieve this URL

HTTP errors are often intermittent, and a simple retry will get you on your way.

2. Solution: open “C:\users\your computer name\condarc

Delete all lines in condarc, copy and paste the following code, and then save:

channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - defaults
show_channel_urls: true
ssl_verify: true

(anyway, I can finally succeed in this file with the above code. I don’t know if you can do it.

3. Re run

conda install -c stellargraph stellargraph
    1. as long as you don’t report an error (try it several times, it may not work well). Maybe it will take a long time. Please be patient. If you want to improve the speed, you’d better create a new virtual environment and install the software, which will be much faster

Create a new environment ( CONDA env create - n env_name ) and install the software. In this way, the compatibility with the existing software will not be considered. It can also greatly reduce the search space and improve the speed of resolving software dependencies.

Apex library Install Error: amp not installed error [How to Solve]

Problem Description:

the apex library is missing and needs to be installed! Note: do not use PIP install apex. Although it can be installed successfully, it will still be found that there are errors when running the program in the end. It can’t be used

The specific installation steps are as follows:

# When you execute git to download the apex folder, if the download is too slow, you can manually enter the URL https://github.com/NVIDIA/apex to download and unzip and perform subsequent operations
git clone https://github.com/NVIDIA/apex
cd apex
python setup.py install

After execution, if the results shown in the figure below appear, the installation is successful

Remember to collect, in case you can’t find it next time
for my sake, please give me a compliment before you leave

Conda create New environment Error: An unexpected error has occurred. Conda has prepared the above report.

Problem Description:

In Anaconda prompt (anaconda3), use the CONDA create command to create a new environment. The error is as follows:

(base) D:\OneDrive\Desktop>conda create -n my_env python==3.8
Collecting package metadata (current_repodata.json): failed

# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<

    Traceback (most recent call last):
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 259, in _load
        raw_repodata_str = fetch_repodata_remote_request(
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 613, in fetch_repodata_remote_request
        raise Response304ContentUnchanged()
    conda.core.subdir_data.Response304ContentUnchanged

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "D:\anaconda3\lib\site-packages\conda\exceptions.py", line 1079, in __call__
        return func(*args, **kwargs)
      File "D:\anaconda3\lib\site-packages\conda\cli\main.py", line 84, in _main
        exit_code = do_call(args, p)
      File "D:\anaconda3\lib\site-packages\conda\cli\conda_argparse.py", line 83, in do_call
        return getattr(module, func_name)(args, parser)
      File "D:\anaconda3\lib\site-packages\conda\cli\main_create.py", line 41, in execute
        install(args, parser, 'create')
      File "D:\anaconda3\lib\site-packages\conda\cli\install.py", line 261, in install
        unlink_link_transaction = solver.solve_for_transaction(
      File "D:\anaconda3\lib\site-packages\conda\core\solve.py", line 114, in solve_for_transaction
        unlink_precs, link_precs = self.solve_for_diff(update_modifier, deps_modifier,
      File "D:\anaconda3\lib\site-packages\conda\core\solve.py", line 157, in solve_for_diff
        final_precs = self.solve_final_state(update_modifier, deps_modifier, prune, ignore_pinned,
      File "D:\anaconda3\lib\site-packages\conda\core\solve.py", line 262, in solve_final_state
        ssc = self._collect_all_metadata(ssc)
      File "D:\anaconda3\lib\site-packages\conda\common\io.py", line 88, in decorated
        return f(*args, **kwds)
      File "D:\anaconda3\lib\site-packages\conda\core\solve.py", line 425, in _collect_all_metadata
        index, r = self._prepare(prepared_specs)
      File "D:\anaconda3\lib\site-packages\conda\core\solve.py", line 1020, in _prepare
        reduced_index = get_reduced_index(self.prefix, self.channels,
      File "D:\anaconda3\lib\site-packages\conda\core\index.py", line 276, in get_reduced_index
        new_records = SubdirData.query_all(spec, channels=channels, subdirs=subdirs,
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 120, in query_all
        result = tuple(concat(executor.map(subdir_query, channel_urls)))
      File "D:\anaconda3\lib\concurrent\futures\_base.py", line 611, in result_iterator
        yield fs.pop().result()
      File "D:\anaconda3\lib\concurrent\futures\_base.py", line 432, in result
        return self.__get_result()
      File "D:\anaconda3\lib\concurrent\futures\_base.py", line 388, in __get_result
        raise self._exception
      File "D:\anaconda3\lib\concurrent\futures\thread.py", line 57, in run
        result = self.fn(*self.args, **self.kwargs)
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 112, in <lambda>
        subdir_query = lambda url: tuple(SubdirData(Channel(url), repodata_fn=repodata_fn).query(
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 125, in query
        self.load()
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 189, in load
        _internal_state = self._load()
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 277, in _load
        _internal_state = self._read_local_repdata(mod_etag_headers.get('_etag'),
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 326, in _read_local_repdata
        _internal_state = self._process_raw_repodata_str(raw_repodata_str)
      File "D:\anaconda3\lib\site-packages\conda\core\subdir_data.py", line 364, in _process_raw_repodata_str
        json_obj = json.loads(raw_repodata_str or '{}')
      File "D:\anaconda3\lib\json\__init__.py", line 357, in loads
        return _default_decoder.decode(s)
      File "D:\anaconda3\lib\json\decoder.py", line 337, in decode
        obj, end = self.raw_decode(s, idx=_w(s, 0).end())
      File "D:\anaconda3\lib\json\decoder.py", line 353, in raw_decode
        obj, end = self.scan_once(s, idx)
    json.decoder.JSONDecodeError: Expecting ',' delimiter: line 420202 column 26 (char 12681108)

`$ D:\anaconda3\Scripts\conda-script.py create -n my_env python==3.8`

  environment variables:
                 CIO_TEST=<not set>
                CLASSPATH=.;D:\Programming Environment\Java\java_8\lib\dt.jar;D:\Programming
                          Environment\Java\java_8\lib\tools.jar;
        CONDA_DEFAULT_ENV=base
                CONDA_EXE=D:\anaconda3\condabin\..\Scripts\conda.exe
               CONDA_EXES="D:\anaconda3\condabin\..\Scripts\conda.exe"
             CONDA_PREFIX=D:\Anaconda3
    CONDA_PROMPT_MODIFIER=(base)
         CONDA_PYTHON_EXE=D:\anaconda3\python.exe
               CONDA_ROOT=D:\anaconda3
              CONDA_SHLVL=1
                CUDA_PATH=D:\Mx-yolov3\CUDAv10.0
           CURL_CA_BUNDLE=<not set>
                 HOMEPATH=\Users\MSTIFIY
          NVTOOLSEXT_PATH=C:\Program Files\NVIDIA Corporation\NvToolsExt\
                     PATH=D:\anaconda3;D:\anaconda3\Library\mingw-w64\bin;D:\anaconda3\Library\u
                          sr\bin;D:\anaconda3\Library\bin;D:\anaconda3\Scripts;D:\anaconda3\bin;
                          D:\Anaconda3;D:\Anaconda3\Library\mingw-w64\bin;D:\Anaconda3\Library\u
                          sr\bin;D:\Anaconda3\Library\bin;D:\Anaconda3\Scripts;D:\Anaconda3\bin;
                          D:\anaconda3\condabin;D:\Mx-yolov3\CUDAv10.0\bin;D:\Mx-yolov3\CUDAv10.
                          0\libnvvp;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS;C:\WINDOWS\sy
                          stem32;C:\WINDOWS\System32;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System3
                          2\WindowsPowerShell\v1.0;C:\WINDOWS\System32\OpenSSH;D:\Lauguage
                          Studing\PythonSpider;C:\Program Files
                          (x86)\Google\Chrome\Application\chromedriver;D:\Programming
                          Environment\Java\java_8;D:\Lauguage
                          Studing\Android\Git\Git\cmd;D:\Programming Environment\Tesseract-
                          OCR;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance
                          Toolkit;C:\Program Files (x86)\NVIDIA
                          Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA
                          NvDLISR;D:\Lauguage Studing\Matlab\runtime\win64;D:\Lauguage
                          Studing\Matlab\bin;D:\Lauguage
                          Studing\Matlab\polyspace\bin;D:\Lauguage
                          Studing\opencv3.4.0\opencv\build\x64\vc14\bin;D:\Lauguage Studing\rasp
                          berry\putty;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:
                          \WINDOWS\System32\WindowsPowerShell\v1.0;C:\WINDOWS\System32\OpenSSH;D
                          :\anaconda3\envs\Mx_yolov3\Scripts;D:\anaconda3\envs\Mx_yolov3;D:\Andr
                          oidSDK;\platform-tools;D:\AndroidSDK;\tools;D:\Tools\cmake-3.21.2-wind
                          ows-x86_64\bin;C:\WINDOWS;C:\WINDOWS\system32;C:\WINDOWS\System32;C:\W
                          INDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\WIN
                          DOWS\System32\OpenSSH;D:\Programming
                          Environment\python;D:\Fiddler;D:\Lauguage Studing\鐖櫕\PyCharm
                          Community Edition 2019.3.1\bin;.;D:\Programming
                          Environment\python\Scripts;C:\Program Files
                          (x86)\Google\Chrome\Application;D:\Programming
                          Environment\Java\java_8\bin;D:\Programming
                          Environment\Java\java_8\jre\bin;"D:\Programming
                          Environment\Java\java_8\bin;D:\Mx-yolov3\CUDAv10.0\bin;D:\Mx-yolov3\CU
                          DAv10.0\libnvvp;C:\ProgramData\Oracle\Java\javapath;C:\WINDOWS;C:\WIND
                          OWS\system32;C:\WINDOWS\System32;C:\WINDOWS\System32\Wbem;C:\WINDOWS\S
                          ystem32\WindowsPowerShell\v1.0;C:\WINDOWS\System32\OpenSSH;D:\Lauguage
                          Studing\PythonSpider;C:\Program Files
                          (x86)\Google\Chrome\Application\chromedriver;D:\Programming
                          Environment\Java\java_8;D:\Lauguage
                          Studing\Android\Git\Git\cmd;D:\Programming Environment\Tesseract-
                          OCR;C:\Program Files (x86)\Windows Kits\8.1\Windows Performance
                          Toolkit;C:\Program Files (x86)\NVIDIA
                          Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA
                          NvDLISR;D:\Lauguage Studing\Matlab\runtime\win64;D:\Lauguage
                          Studing\Matlab\bin;D:\Lauguage
                          Studing\Matlab\polyspace\bin;D:\Lauguage
                          Studing\opencv3.4.0\opencv\build\x64\vc14\bin;D:\Lauguage Studing\rasp
                          berry\putty;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:
                          \WINDOWS\System32\WindowsPowerShell\v1.0;C:\WINDOWS\System32\OpenSSH;D
                          :\anaconda3\envs\Mx_yolov3\Scripts;D:\anaconda3\envs\Mx_yolov3;D:\Andr
                          oidSDK;\platform-tools;D:\AndroidSDK;\tools;D:\Tools\cmake-3.21.2-wind
                          ows-x86_64\bin;";"D:\AndroidSDK;\platform-
                          tools;D:\AndroidSDK;\tools鈥嬧€嬧€嬧€嬧€嬧€嬧€?;D:\Programming
                          Environment\Tesseract-OCR;D:\anaconda3;C:\Users\MSTIFIY\AppData\Local\
                          Microsoft\WindowsApps;D:\Lauguage Studing\miktex\MiKTeX\miktex\bin\x64
             PSMODULEPATH=C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\Windows
                          PowerShell\v1.0\Modules
       REQUESTS_CA_BUNDLE=<not set>
            SSL_CERT_FILE=<not set>

     active environment : base
    active env location : D:\Anaconda3
            shell level : 1
       user config file : C:\Users\MSTIFIY\.condarc
 populated config files : C:\Users\MSTIFIY\.condarc
          conda version : 4.9.2
    conda-build version : 3.18.11
         python version : 3.8.3.final.0
       virtual packages : __cuda=10.2=0
                          __win=0=0
                          __archspec=1=x86_64
       base environment : D:\anaconda3  (writable)
           channel URLs : https://mirrors.ustc.edu.cn/anaconda/pkgs/main/win-64
                          https://mirrors.ustc.edu.cn/anaconda/pkgs/main/noarch
                          https://mirrors.ustc.edu.cn/anaconda/pkgs/free/win-64
                          https://mirrors.ustc.edu.cn/anaconda/pkgs/free/noarch
                          https://mirrors.ustc.edu.cn/anaconda/cloud/conda-forge/win-64
                          https://mirrors.ustc.edu.cn/anaconda/cloud/conda-forge/noarch
          package cache : D:\anaconda3\pkgs
                          C:\Users\MSTIFIY\.conda\pkgs
                          C:\Users\MSTIFIY\AppData\Local\conda\conda\pkgs
       envs directories : D:\anaconda3\envs
                          C:\Users\MSTIFIY\.conda\envs
                          C:\Users\MSTIFIY\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.9.2 requests/2.24.0 CPython/3.8.3 Windows/10 Windows/10.0.19041
          administrator : False
             netrc file : None
           offline mode : False


An unexpected error has occurred. Conda has prepared the above report.

If submitted, this report will be used by core maintainers to improve
future releases of conda.
Would you like conda to send this report to the core maintainers?

[y/N]:

Solution:

Open the .Condarc file:

channels:
  - https://mirrors.ustc.edu.cn/anaconda/pkgs/main/
  - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/
  - https://mirrors.ustc.edu.cn/anaconda/cloud/conda-forge/
ssl_verify: true

Delete the mirror source of CONDA forge 

channels:
  - https://mirrors.ustc.edu.cn/anaconda/pkgs/main/
  - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/
ssl_verify: true

Create a new environment again. The operation is successful.

Condahttpererror: http 000 connection failed for URL problem in CONDA installation package

Problems occurred when using CONDA install package locally for win10
fetching package metadata... Condahttterror: http 000 connection failed for URL & lt; https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/win-64/repodata.json> ; Elapsed: - 'ssl3_ get_ server_ certificate', 'certificate verify failed')],)",),),)

First, let’s see if it’s the source problem: change the. Condarc file according to the following article
change the. Condarc file according to the link

If it still fails, it may be the problem of HTTPS protocol. Change HTTPS in. Condarc to http.